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ChinaColosseum in Rome, ItalyTaj Mahal in Agra, IndiaThe Giza pyramid complex in EgyptNeuschwanstein Castle in Bavaria, GermanyThe Temple of the Emerald Buddha – royal chapel within the Grand Palace, Bangkok, Thailand.Christ the Redeemer in Rio de Janeiro, BrazilTourism is travel for recreational, leisure or business purposes. The World Tourism Organization defines tourists as people who "travel to and stay in places outside their usual environment for more than twenty-four (24) hours and not more than one consecutive year for leisure, business and other purposes not related to the exercise of an activity remunerated from within the place visited".[3] Tourism has become a popular global leisure activity. In 2007, there were over 903 million international tourist arrivals, with a growth of 6.6% as compared to 2006. International tourist receipts were USD 856 billion in 2007.[4]Despite the uncertainties in the global economy, international tourist arrivals during the first four months of 2008 followed a similar growth trend than the same period in 2007.[4] However, as a result of the economic crisis of 2008, international travel demand suffered a strong slowdown beginning in June 2008, with growth in international tourism arrivals worldwide falling to 2% during the boreal summer months, while growth from January to April 2008 had reached an average 5.7% compared to its 2007 level. Growth from 2006 to 2007 was only 3.7%, as total international tourism arrivals from January to August were 641 million tourists, up from 618 million in the same period in 2007.[5]Tourism is vital for many countries, such as the U.A.E, Egypt, Greece and Thailand, and many island nations, such as The Bahamas, Fiji, Maldives and the Seychelles, due to the large intake of money for businesses with their goods and services and the opportunity for employment in the service industries associated with tourism. These service industries include transportation services, such as airlines, cruise ships and taxis, hospitality services, such as accommodations, including hotels and resorts, and entertainment venues, such as amusement parks, casinos, shopping malls, various music venues and the theatre.DefinitionHunziker and Krapf, in 1941, defined tourism as people who travel "the sum of the phenomena and relationships arising from the travel and stay of non-residents, insofar as they do not lead to permanent residence and are not connected with any earning activity."[6] In 1976, the Tourism Society of England's definition was: "Tourism is the temporary, short-term movement of people to destination outside the places where they normally live and work and their activities during the stay at each destination. It includes movements for all purposes."[citation needed] In 1981, the International Association of Scientific Experts in Tourism defined tourism in terms of particular activities selected by choice and undertaken outside the home.[7]The United Nations classified three forms of tourism in 1994, in its "Recommendations on Tourism Statistics: Domestic tourism", which involves residents of the given country traveling only within this country; Inbound tourism, involving non-residents traveling in the given country; and Outbound tourism, involving residents traveling in another country.[citation needed] The UN also derived different categories of tourism by combining the three basic forms of tourism: Internal tourism, which comprises domestic tourism and inbound tourism; National tourism, which comprises domestic tourism and outbound tourism; and International tourism, which consists of inbound tourism and outbound tourism. Intrabound tourism is a term coined by the Korea Tourism Organization and widely accepted in orea.[citation needed] Intrabound tourism differs from domestic tourism in that the former encompasses policymaking and implementation of national tourism policies.[citation needed]Recently, the tourism industry has shifted from the promotion of inbound tourism to the promotion of intrabound tourism, because many countries are experiencing tough competition for inbound tourists.[citation needed] Some national policymakers have shifted their priority to the promotion of intrabound tourism to contribute to the local economy. Examples of such campaigns include: "See America" in the United States; "Truly Asia" in Malaysia; "Get Going Canada" in Canada; "Peru. Live the Legend" in Peru; "Wow Philippines" in the Philippines; "Uniquely Singapore" in Singapore; "100% Pure New Zealand" in New Zealand; "Amazing Thailand" in Thailand; "Incredible India" in India; and "The Hidden Charm" in Vietnam.[citation needed]HistoryKinkaku-ji, the Golden Pavilion temple in Kyoto, Japan.Dubai, UAEThe Matterhorn, near Zermatt in the Swiss Alps.The Great Bath at the Roman Baths in Bath, Somerset, one of the world's first health tourism sites.Ski jumping hill in Karpacz, PolandWealthy people have always traveled to distant parts of the world, to see great buildings, works of art, learn new languages, experience new cultures and to taste different cuisines. Long ago, at the time of the Roman Republic, places such as Baiae, were popular coastal resorts for the rich. The word tourism was used by 1811 and tourist by 1840.[19] In 1936, the League of Nations defined foreign tourist as "someone travelling abroad for at least twenty-four hours". Its successor, the United Nations, amended this definition in 1945, by including a maximum stay of six months.[20][edit] Leisure travelLeisure travel was associated with the Industrial Revolution in the United Kingdom – the first European country to promote leisure time to the increasing industrial population.[citation needed] Initially, this applied to the owners of the machinery of production, the economic oligarchy, the factory owners and the traders. These comprised the new middle class. Cox & Kings was the first official travel company to be formed in 1758.[21]The British origin of this new industry is reflected in many place names. In Nice, France, one of the first and best-established holiday resorts on the French Riviera, the long esplanade along the seafront is known to this day as the Promenade des Anglais; in many other historic resorts in continental Europe, old, well-established palace hotels have names like the Hotel Bristol, the Hotel Carlton or the Hotel Majestic – reflecting the dominance of English customers.Many leisure-oriented tourists travel to the tropics, both in the summer and winter. Places often visited are: Cuba, the Dominican Republic, Thailand, North Queensland in Australia and Florida in the United States.[edit] Winter tourismMajor ski resorts are located in the various European countries (e.g. Austria, Czech Republic, France, Germany, Italy, Norway, Poland, Slovakia, Spain, Switzerland), Canada, the United States, Australia, New Zealand, Japan, Korea, Chile and Argentina.[edit] Mass tourismMass tourism could only have developed with the improvements in technology, allowing the transport of large numbers of people in a short space of time to places of leisure interest, so that greater numbers of people began to enjoy the benefits of leisure time.In the United States, the first great seaside resort, in the European style, was Atlantic City, New Jersey and Long Island, New York.In continental Europe, early resorts included: Ostend, popularized by the people of Brussels; Boulogne-sur-Mer (Pas-de-Calais) and Deauville (Calvados) for the Parisians; and Heiligendamm, founded in 1797, as the first seaside resort at the Baltic Sea.[edit] Adjectival tourismsSee also: List of adjectival tourismsAdjectival tourism refers to the numerous niche or specialty travel forms of tourism that have emerged over the years, each with its own adjective. Many of these have come into common use by the tourism industry and academics.[citation needed] Others are emerging concepts that may or may not gain popular usage. Examples of the more common niche tourism markets include:Recent developmentsRed Square in Moscow, Russia.Iguazu Falls on the Argentina-Brazil borderGalápagos Islands, EcuadorPragueBuenos AiresN Seoul Tower in South Korea.There has been an upmarket trend in the tourism over the last few decades, especially in Europe, where international travel for short breaks is common.[citation needed] Tourists have higher levels of disposable income and greater leisure time and they are also better-educated and have more sophisticated tastes.[citation needed] There is now a demand for a better quality products, which has resulted in a fragmenting of the mass market for beach vacations; people want more specialised versions, such as Club 18-30, quieter resorts, family-oriented holidays or niche market-targeted destination hotels.The developments in technology and transport infrastructure, such as jumbo jets, low-cost airlines and more accessible airports have made many types of tourism more affordable. There have also been changes in lifestyle, such as retiree-age people who sustain year round tourism. This is facilitated by internet sales of tourism products. Some sites have now started to offer dynamic packaging, in which an inclusive price is quoted for a tailor-made package requested by the customer upon impulse.There have been a few setbacks in tourism, such as the September 11 attacks and terrorist threats to tourist destinations, such as in Bali and several European cities. Also, on December 26, 2004, a tsunami, caused by the 2004 Indian Ocean earthquake, hit the Asian countries on the Indian Ocean, including the Maldives. Thousands of lives were lost and many tourists died. This, together with the vast clean-up operation in place, has stopped or severely hampered tourism to the area.The terms tourism and travel are sometimes used interchangeably. In this context, travel has a similar definition to tourism, but implies a more purposeful journey. The terms tourism and tourist are sometimes used pejoratively, to imply a shallow interest in the cultures or locations visited by tourists.[edit] Sustainable tourism"Sustainable tourism is envisaged as leading to management of all resources in such a way that economic, social and aesthetic needs can be fulfilled while maintaining cultural integrity, essential ecological processes, biological diversity and life support systems." (World Tourism Organization)Sustainable development implies "meeting the needs of the present without compromising the ability of future generations to meet their own needs" (World Commission on Environment and Development, 1987)[22][edit] Eco-tourismMain article: Eco-tourism[edit] Medical tourismMain article: Medical tourismWhen there is a significant price difference between countries for a given medical procedure, particularly in Southeast Asia, India, Eastern Europe and where there are different regulatory regimes, in relation to particular medical procedures (e.g. dentistry), travelling to take advantage of the price or regulatory differences is often referred to as "medical tourism".[edit] Educational tourismEducational tourism developed, because of the growing popularity of teaching and learning of knowledge and the enhancing of technical competency outside of the classroom environment.[citation needed] In educational tourism, the main focus of the tour or leisure activity includes visiting another country to learn about the culture, such as in Student Exchange Programs and Study Tours, or to work and apply skills learned inside the classroom in a different environment, such as in the International Practicum Training Program.[edit] Other developments[edit] Creative tourismCreative tourism has existed as a form of cultural tourism, since the early beginnings of tourism itself. Its European roots date back to the time of the Grand Tour, which saw the sons of aristocratic families traveling for the purpose of mostly interactive, educational experiences. More recently, creative tourism has been given its own name by Crispin Raymond and Greg Richards[citation needed], who as members of the Association for Tourism and Leisure Education (ATLAS), have directed a number of projects for the European Commission, including cultural and crafts tourism, known as sustainable tourism. They have defined "creative tourism" as tourism related to the active participation of travelers in the culture of the host community, through interactive workshops and informal learning experiences.[citation needed]Meanwhile, the concept of creative tourism has been picked up by high-profile organizations such as UNESCO, who through the Creative Cities Network, have endorsed creative tourism as an engaged, authentic experience that promotes an active understanding of the specific cultural features of a place.[citation needed]More recently, creative tourism has gained popularity as a form of cultural tourism, drawing on active participation by travelers in the culture of the host communities they visit. Several countries offer examples of this type of tourism development, including the United Kingdom, the Bahamas, Jamaica, Spain, Italy and New Zealand.[edit] Dark tourismOne emerging area of special interest tourism has been identified by Lennon and Foley (2000)[citation needed] as "dark" tourism. This type of tourism involves visits to "dark" sites, such as battlegrounds, scenes of horrific crimes or acts of genocide, for example: concentration camps. Dark tourism poses severe ethical and moral dilemmas: should these sites be available for visitation and, if so, what should the nature of the publicity involved be. Dark tourism remains a small niche market, driven by varied motivations, such as mourning, remembrance, macabre curiosity or even entertainment. Its early origins are rooted in fairgrounds and medieval fairs.[23][edit] Growthnternational tourism receipts in 2005he Hagia Sophia – originally a church, later a mosque, now a museum in Istanbul, Turkey.The World Tourism Organization (UNWTO) forecasts that international tourism will continue growing at the average annual rate of 4 %.[24] By 2020 Europe will remain the most popular destination, but its share will drop from 60% in 1995 to 46%. Long-haul will grow slightly faster than intraregional travel and by 2020 its share will increase from 18% in 1995 to 24%.[citation needed]With the advent of e-commerce, tourism products have become one of the most traded items on the internet.[citation needed] Tourism products and services have been made available through intermediaries, although tourism providers (hotels, airlines, etc.) can sell their services directly. This has put pressure on intermediaries from both on-line and traditional shops.It has been suggested there is a strong correlation between Tourism expenditure per capita and the degree to which countries play in the global context.[25] Not only as a result of the important economic contribution of the tourism industry, but also as an indicator of the degree of confidence with which global citizens leverage the resources of the globe for the benefit of their local economies. This is why any projections of growth in tourism may serve as an indication of the relative influence that each country will exercise in the future.Space tourism is expected to "take off" in the first quarter of the 21st century, although compared with traditional destinations the number of tourists in orbit will remain low until technologies such as a space elevator make space travel cheap.[citation needed]Technological improvement is likely to make possible air-ship hotels, based either on solar-powered airplanes or large dirigibles.[citation needed] Underwater hotels, such as Hydropolis, expected to open in Dubai in 2009, will be built. On the ocean, tourists will be welcomed by ever larger cruise ships and perhaps floating cities.[citation needed][edit] Latest trendsAs a result of the economic crisis of 2008, international arrivals suffered a strong slowdown beginning in June 2008. Growth from 2007 to 2008 was only 3.7% during the first eight months of 2008. The Asian and Pacific markets were affected and Europe stagnated during the boreal summer months, while the Americas performed better, reducing their expansion rate but keeping a 6% growth from January to August 2008. Only the Middle East continued its rapid growth during the same period, reaching a 17% growth as compared to the same period in 2007.[5] This slowdown on international tourism demand was also reflected in the air transport industry, with a negative growth in September 2008 and a 3.3% growth in passenger traffic through September. The hotel industry also reports a slowdown, as room occupancy continues to decline.[5] As the global economic situation deteriorated dramatically during September and October as a result of the global financial crisis, growth of international tourism is expected to slow even further for the remaining of 2008, and this slowdown in demand growth is forecasted to continue into 2009 as recession has already hit most of the top spender countries, with long-haul travel expected to be the most affected by the economic crisis.[5]. However, some travel destinations have experienced growth during hard economic times, drawing on low costs of living, accessibility, and friendly immigration laws permitting tourists to stay for extended periods of time. Recession tourism, a phrase coined by Matt Landau in his research about Panama, has evolved as an alternative escape option for nervous crisis-goers in 2009.[citation needed]According to the Bureau of Economic Analysis, direct tourism employment comprises all jobs where the workers are engaged in the production of direct tourism output (such as hotel staff, airline pilots, and souvenir sellers). In the third quarter of 2008, tourism-related employment of 8.6 million jobs in the US consisted of 5.9 million (69%) direct tourism jobs—jobs where workers produce goods and services sold directly to visitors—and 2.7 million (31%) indirect tourism-related jobs. Indirect tourism refers to jobs where workers produce goods and services used to produce what visitors buy. As the US economy struggled, in the fourth quarter of 2008, passenger air transportation continued to contract—falling 13.0% in 2008, after decreasing 20.0% in the third quarter. Spending on domestic flights declined for the fifth consecutive quarter but real spending on international flights rose a modest 1.0% after a sharp decline of 35.4%in the previous quarter. [26]In the USA in 2008, revenue in the tourism industry fell by 3.5% to $1.31 trillion dollars. While still a large amount, tourism revenue fell as unemployment in the country and around the world rose and the international economic recession led to the cancellation of planned trips, including trips to US. [27][edit] Negative impacts This section requires expansion.Tourism is the issue that nearly every city faces. It is worldwide and a threat to beaches, famous landmarks,holy areas and also resorts. Attracting a high volume of tourists can have negative impacts, such as the impact of 33 million tourists a year on the city

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based on tiny integrated circuits are millions to billions of times more capable than the early machines, and occupy a fraction of the space.[2] Simple computers are small enough to fit into a wristwatch, and can be powered by a watch battery. Personal computers in their various forms are icons of the Information Age, what most people think of as a "computer", but the embedded computers found in devices ranging from fighter aircraft to industrial robots, digital cameras, and children's toys are the most umerous.The ability to store and execute lists of instructions called programs makes computers extremely versatile, distinguishing them from calculators. The Church–Turing thesis is a mathematical statement of this versatility: any computer with a certain minimum capability is, in principle, capable of performing the same tasks that any other computer can perform. Therefore computers ranging from a personal digital assistant to a supercomputer are all able to perform the same omputational tasks, given enough time and storage capacity.The first use of the word "computer" was recorded in 1613, referring to a person who carried out calculations, or computations, and the word continued to be used in that sense until the middle of the 20th century. From the end of the 19th century onwards though, the word began to take on its more familiar meaning, decribing a machine that carries out computations.[3]The history of the modern computer begins with two separate technologies—automated calculation and programmability—but no single device can be identified as the earliest computer, partly because of the inconsistent application of that term. Examples of early mechanical calculating devices include the abacus, the slide rule and arguably the astrolabe and the Antikythera mechanism (which dates from about 150–100 BC). Hero of Alexandria (c. 10–70 AD) built a mechanical theater which performed a play lasting 10 minutes and was operated by a complex system of ropes and drums that might be considered to be a means of deciding which parts of the mechanism performed which actions and when.[4] This is the essence of programmability.The "castle clock", an astronomical clock invented by Al-Jazari in 1206, is considered to be the earliest programmable analog computer.[5] It displayed the zodiac, the solar and lunar orbits, a crescent moon-shaped pointer travelling across a gateway causing automatic doors to open every hour,[6][7] and five robotic musicians who played music when struck by levers operated by a camshaft attached to a water wheel. The length of day and night could be re-programmed to compensate for the changing lengths of day and night throughout the year.[5]The end of the Middle Ages saw a re-invigoration of European mathematics and engineering. Wilhelm Schickard's 1623 device was the first of a number of mechanical calculators constructed by European engineers, but none fit the modern definition of a computer, because they could not be programmed.In 1801, Joseph Marie Jacquard made an improvement to the textile loom by introducing a series of punched paper cards as a template which allowed his loom to weave intricate patterns automatically. The resulting Jacquard loom as an important step in the development of computers because the use of punched cards to define woven patterns can be viewed as an early, albeit limited, form of programmability.It was the fusion of automatic calculation with programmability that produced the first recognizable computers. In 1837, Charles Babbage was the first to conceptualize and design a fully programmable mechanical computer, his analytical engine.[8] Limited finances and Babbage's inability to resist tinkering with the design meant that the device was never completed.In the late 1880s Herman Hollerith invented the recording of data on a machine readable medium. Prior uses of machine readable media, above, had been for control, not data. "After some initial trials with paper tape, he settled on punched cards ..."[9] To process these punched cards he invented the tabulator, and the key punch machines. These three inventions were the foundation of the modern information processing industry. Large-scale automated data processing of punched cards was performed for the 1890 United States Census by Hollerith's company, which later became the core of IBM. By the end of the 19th century a number of technologies that would later prove useful in the realization of practical computers had begun to appear: the punched card, Boolean algebra, the vacuum tube (thermionic valve) and the teleprinter.During the first half of the 20th century, many scientific computing needs were met by increasingly sophisticated analog computers, which used a direct mechanical or electrical model of the problem as a basis for computation. However, these were not programmable and generally lacked the versatility and accuracy of modern digital computers.George Stibitz is internationally recognized as a father of the modern digital computer. While working at Bell Labs in November of 1937, Stibitz invented and built a relay-based calculator he dubbed the "Model K" (for "kitchen table", on which he had assembled it), which was the first to use binary circuits to perform an arithmetic operation. Later models added greater sophistication including complex arithmetic and programmability.[10]A succession of steadily more powerful and flexible computing devices were constructed in the 1930s and 1940s, gradually adding the key features that are seen in modern computers. The use of digital electronics (largely invented by Claude Shannon in 1937) and more flexible programmability were vitally important steps, but defining one point along this road as "the first digital electronic computer" is difficult (Shannon 1940). Notable achievements include:EDSAC was one of the first computers to implement the stored program (von Neumann) architecture. * Konrad Zuse's electromechanical "Z machines". The Z3 (1941) was the first working machine featuring binary arithmetic, including floating point arithmetic and a measure of programmability. In 1998 the Z3 was proved to be Turing complete, therefore being the world's first operational computer. * The non-programmable Atanasoff–Berry Computer (1941) which used vacuum tube based computation, binary numbers, and regenerative capacitor memory. The use of regenerative memory allowed it to be much more compact then its peers (being approximately the size of a large desk or workbench), since intermediate results could be stored and then fed back into the same set of computation elements. * The secret British Colossus computers (1943),[11] which had limited programmability but demonstrated that a device using thousands of tubes could be reasonably reliable and electronically reprogrammable. It was used for breaking German wartime codes. * The Harvard Mark I (1944), a large-scale ctromechanical computer with limited programmability. * The U.S. Army's Ballistics Research Laboratory IAC (1946), which used decimal arithmetic and is sometimes called the first general purpose electronic computer (since Konrad Zuse's Z3 of 1941 used electromagnets instead of electronics). Initially, however, ENIAC had an inflexible architecture which essentially required rewiring to change its programming.everal developers of ENIAC, recognizing its flaws, came up with a far more flexible and elegant design, which came to be known as the "stored program architecture" or von Neumann architecture. This design was first formally described by John von Neumann in the paper First Draft of a Report on the EDVAC, distributed in 1945. A number of projects to develop computers based on the stored-program architecture commenced around this time, the first of these being completed in Great Britain. The first to be demonstrated working was the Manchester Small-Scale Experimental Machine (SSEM or "Baby"), while the EDSAC, completed a year after SSEM, was the first practical implementation of the stored program design. Shortly thereafter, the machine originally described by von Neumann's paper—EDVAC—was completed but did not see full-time use for an additional two years.Nearly all modern computers implement some form of the stored-program architecture, making it the single trait by which the word "computer" is now defined. While the technologies used in computers have changed dramatically since the first electronic, general-purpose computers of the 1940s, most still use the von Neumann architecture.icroprocessors are miniaturized devices that often implement stored program CPUs.omputers using vacuum tubes as their electronic elements were in use throughout the 1950s, but by the 1960s had been largely replaced by transistor-based machines, which were smaller, faster, cheaper to produce, required less power, and were more reliable. The first transistorised computer was demonstrated at the University of Manchester in 1953.[12] In the 1970s, integrated circuit technology and the subsequent creation of microprocessors, such as the Intel 4004, further decreased size and cost and further inc light unit. The rechargeable battery required is charged from an AC/DC adapter and typically stores enough energy to run the laptop for two to three ours in its initial state, depending on the configuration and power management of the omputer.Laptops are usually shaped like a large notebook with thicknesses between 0.7–1.5 inches (18–38 mm) and ensions ranging from 10x8 inches (27x22cm, 13" display) to 15x11 inches (39x28cm, 17" display) and up. Modern laptops weigh 3 to 12 pounds (1.4 to 5.4 kg); older laptops were usually heavier. Most laptops are designed in the flip form factor to protect the screen and the keyboard when closed. Modern 'tablet' laptops have a complex joint between the keyboard housing and the display, permitting the display panel to twist and then lay flat on the keyboard housing. They usually have a touchscreen display and some include handwriting recognition or graphics drawing capability.Laptops were originally considered to be "a small niche market"[2] and were thought suitable mostly for "specialized field applications" such as "the military, the Internal Revenue Service, accountants and sales representatives".[2][3] Battery-powered portable computers had just 2% worldwide market share in 1986[4]. But today, there are already more laptops than desktops in businesses, and laptops are becoming obligatory for student use and more popular for general use.[5] In 2008 more laptops than desktops were sold in the US[6] and according to a forecast by the research firm IDC and Intel, the same milestone will be achieved in the worldwide PC market as soon as 2009.[6][7]Contents[hide] * 1 History * 2 Classification o 2.1 As replacement o 2.2 Notebook o 2.3 Subnotebook o 2.4 Netbook o 2.5 Rugged Laptop * 3 Components o 3.1 Docking stations o 3.2 Standards * 4 Advantages * 5 Disadvantages o 5.1 Performance o 5.2 Upgradeability o 5.3 Ergonomics and health o 5.4 Durability o 5.5 Security * 6 Major brands and manufacturers * 7 Sales * 8 See also * 9 References[edit] Historyain article: History of laptopshe Epson HX-20As the personal computer became feasible in the early 1970s, the idea of a portable personal computer followed. In particular, a "personal, portable information manipulator" was imagined by Alan Kay at Xerox PARC in 1968[8] and described in his 1972 paper as the "Dynabook"[9].The I.B.M. SCAMP project (Special Computer APL Machine Portable), was demonstrated in 1973. This prototype was based on the PALM processor (Put All Logic In Microcode).The I.B.M. 5100, the first commercially available portable computer, appeared in September 1975, and was based on the SCAMP prototype.As 8-bit CPU machines became widely accepted, the number of portables increased rapidly. The Osborne 1 used the Zilog Z80, weighed 23.5 pounds (10.7 kg). It had no battery, only a tiny 5" CRT screen and dual 5¼" single-density floppy drives. In the same year the first laptop-sized portable computer, the Epson HX-20, was announced[10]. The Epson had a LCD screen, a rechargeable battery and a calculator-size printer in a 1.6 kg (4 pounds) chassis. Both Tandy/Radio Shack and HP also produced portable computers of varying designs during this period.The first laptop using the clamshell design, used today by almost all laptops, appeared in 1982. The $8150 GRiD Compass 1100 was used at NASA and by the military among others. The Gavilan SC, released in 1983, was the first notebook marketed using the term "laptop".From 1983 onwards: * Several new input techniques were developed and included in laptops: the touchpad (Gavilan SC, 1983), the pointing stick (IBM ThinkPad 700, 1992) and handwriting recognition (Linus Write-Top[11], 1987). * Some CPUs were designed specifically for low power use (including laptops (Intel i386SL, 1990), and were supported by dynamic power management features (Intel SpeedStep and AMD PowerNow!) in some designs. * Displays reached VGA resolution by 1988 (Compaq SLT 286) and 256-color screens by 1993 (PowerBook 165c), progressing quickly to millions of colors and high resolutions. * High-capacity hard drives and optical storage (CD-ROM followed CD-R and CD-RW and eventually by DVD-ROM and the writable varieties) became available in laptops soon after their introduction to the desktops.Early laptops often had proprietary and incompatible system architectures, operating systems, and bundled applications, making third party hardware and software difficult and sometimes impossible to develop.reased speed and reliability of computers. By the 1980s, computers became sufficiently small and cheap to replace simple mechanical controls in domestic appliances such as washing machines. The 1980s also witnessed home computers and the now ubiquitous personal computer. With the evolution of the Internet, personal computers are becoming as common as the television and the telephone in the household.

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additional services, and accessories, such as SMS for text messaging, email, packet switching for access to the Internet, gaming, Bluetooth, infrared, camera with video recorder and MMS for sending and eceiving photos and video, MP3 player, radio and GPS. Most current mobile phones connect to a ellular network of base stations (cell sites), which is in turn interconnected to the public switched telephone etwork (PSTN) (the exception is satellite phones).The International Telecommunication Union estimated that mobile cellular subscriptions worldwide would reach approximately 4.1 billion by the end of 008[2] and mobile phones are starting to reach the bottom of the economic pyramid.HistoryMain article: istory of mobile phonesAnalog Motorola DynaTAC 8000X Advanced Mobile Phone System mobile phone as of 1983In 1908, U.S. Patent 887,357 for a wireless telephone was issued in to Nathan B. Stubblefield of Murray, Kentucky. He applied this patent to "cave radio" telephones and not directly to cellular telephony as the term is currently understood.[3] Cells for mobile phone base stations were invented in 1947 by Bell Labs engineers at AT&T and further developed by Bell Labs during the 1960s. Radiophones have a long and varied history going back to Reginald Fessenden's invention and shore-to-ship demonstration of radio telephony, through the Second World War with military use of radio telephony links and civil services in the 1950s, while hand-held cellular radio devices have been available since 1973. A patent for the first wireless phone as we know today was issued in US Patent Number 3,449,750 to George Sweigert of Euclid, Ohio on June 10, 1969.In 1945, the zero generation (0G) of mobile telephones was introduced. Like other technologies of the time, it involved a single, powerful base station covering a wide area, and each telephone would effectively monopolize a channel over that whole area while in use. The concepts of frequency reuse and handoff, as well as a number of other concepts that formed the basis of modern cell phone technology, are first described in U.S. Patent 4,152,647, issued May 1, 1979 to Charles A. Gladden and Martin H. Parelman, both of Las Vegas, Nevada and assigned by them to the United States Government.This is the first embodiment of all the concepts that formed the basis of the next major step in mobile telephony, the Analog cellular telephone. Concepts covered in this patent (cited in at least 34 other patents) also were later extended to several satellite communication systems. Later updating of the cellular system to a digital system credits this patent.Martin Cooper, a Motorola researcher and executive is widely considered to be the inventor of the first practical mobile phone for hand-held use in a non-vehicle setting. Cooper is the inventor named on "Radio telephone system" filed on October 17, 1973 with the US Patent Office and later issued as US Patent 3,906,166.[4] Using a modern, if somewhat heavy portable handset, Cooper made the first call on a hand-held mobile phone on April 3, 1973 to a rival, Dr. Joel S. Engel of Bell Labs.[5]The first commercial citywide cellular network was launched in Japan by NTT in 1979. Fully automatic cellular networks were first introduced in the early to mid 1980s (the 1G generation). The Nordic Mobile Telephone (NMT) system went online in Denmark, Finland, Norway and Sweden in 1981.[6]ersonal Handy-phone System mobiles and modems used in Japan around 1997-2003In 1983, Motorola DynaTAC was the first approved mobile phone by FCC in the United States. In 1984, Bell Labs developed modern commercial cellular technology (based, to a large extent, on the Gladden, Parelman Patent), which employed multiple, centrally controlled base stations (cell sites), each providing service to a small area (a cell). The cell sites would be set up such that cells partially overlapped. In a cellular system, a signal between a base station (cell site) and a terminal (phone) only need be strong enough to reach between the two, so the same channel can be used simultaneously for separate conversations in different cells.Cellular systems required several leaps of technology, including handover, which allowed a onversation to continue as a mobile phone traveled from cell to cell. This system included variable transmission power in both the base stations and the telephones (controlled by the base stations), which allowed range and cell size to vary. As the system expanded and neared capacity, the ability to reduce transmission power allowed new cells to be added, resulting in more, smaller cells and thus more capacity. The evidence of this growth can still be seen in the many older, tall cell site towers with no antennae on the upper parts of their towers. These sites originally created large cells, and so had their antennae mounted atop high towers; the towers were designed so that as the system expanded—and cell sizes shrank—the antennae could be lowered on their original masts to reduce range.A 1991 GSM mobile phoneThe first "modern" network technology on digital 2G (second generation) cellular technology was launched by Radiolinja (now part of Elisa Group) in 1991 in Finland on the GSM standard which also marked the introduction of competition in mobile telecoms when Radiolinja challenged incumbent Telecom Finland (now part of TeliaSonera) who ran a 1G NMT network.The first data services appeared on mobile phones starting with person-to-person SMS text messaging in Finland in 1993. First trial payments using a mobile phone to pay for a Coca Cola vending machine were set in Finland in 1998. The first commercial payments were mobile parking trialled in Sweden but first commercially launched in Norway in 1999. The first commercial payment system to mimic banks and credit cards was launched in the Philippines in 1999 simultaneously by mobile operators Globe and Smart. The first content sold to mobile phones was the ringing tone, first launched in 1998 in Finland. The first full internet service on mobile phones was i-Mode introduced by NTT DoCoMo in Japan in 1999.In 2001 the first commercial launch of 3G (Third Generation) was again in Japan by NTT DoCoMo on the WCDMA standard.[7]Until the early 1990s, following introduction of the Motorola MicroTAC, most mobile phones were too large to be carried in a jacket pocket, so they were typically installed in vehicles as car phones. With the miniaturization of digital components and the development of more sophisticated batteries, mobile phones have become smaller and lighter.HandsetsA Nokia phone with box.A printed circuit board inside a mobile phoneThere are several categories of mobile phones, from basic phones to feature phones such as musicphones and cameraphones, to smartphones. The first smartphone was the Nokia 9000 Communicator in 1996 which incorporated PDA functionality to the basic mobile phone at the time. As miniaturisation and increased processing power of microchips has enabled ever more features to be added to phones, the concept of the smartphone has evolved, and what was a high-end smartphone five years ago, is a standard phone today. Several phone series have been introduced to address a given market segment, such as the RIM BlackBerry focusing on enterprise/corporate customer email needs; the SonyEricsson Walkman series of musicphones and Cybershot series of cameraphones; the Nokia N-Series of multimedia phones; and the Apple iPhone which provides full-featured web access and multimedia capabilities.FeaturesMain articles: Mobile phone features, Smartphone, and iPhoneMobile phones often have features beyond sending text messages and making voice calls, including call egisters, GPS navigation, music (MP3) and video (MP4) playback, RDS radio receiver, alarms, memo and document recording, personal organiser and personal digital assistant functions, ability to watch streaming video or download video for later viewing, video calling, built-in cameras (3.2+ Mpx) and camcorders (video recording), with autofocus and flash, ringtones, games, PTT, memory card reader (SD), USB (2.0), infrared, Bluetooth (2.0) and WiFi connectivity, instant messaging, Internet e-mail and browsing and serving as a wireless modem for a PC, and soon will also serve as a console of sorts to online games and other high quality games.Some phones include a touchscreen.The largest categories of mobile services are music, picture downloads, videogaming, adult entertainment, gambling, video/TV.Nokia and the University of Cambridge are showing off a bendable cell phone called Morph.[8]ApplicationsA phone with touchscreen feature.Mobile phone subscribers per 100 inhabitants 1997-2007The most commonly used data application on mobile phones is SMS text messaging, with 74% of all mobile phone users as active users (over 2.4 billion out of 3.3 billion total subscribers at the end of 2007). SMS text messaging was worth over 100 billion dollars in annual revenues in 2007 and the worldwide average of messaging use is 2.6 SMS sent per day per person across the whole mobile phone subscriber base. (source Informa 2007). The first SMS text message was sent from a computer to a mobile phone in 1992 in the UK, while the first person-to-person SMS from phone to phone was sent in Finland in 1993.The other non-SMS data services used by mobile phones were worth 31 Billion dollars in 2007, and were led by mobile music, downloadable logos and pictures, gaming, gambling, adult entertainment and advertising (source: Informa 2007). The first downloadable mobile content was sold to a mobile phone in Finland in 1998, when Radiolinja (now Elisa) introduced the downloadable ringing tone service. In 1999 Japanese mobile operator NTT DoCoMo introduced its mobile internet service, i-Mode, which today is the world's largest mobile internet service and roughly the same size as Google in annual revenues.The first mobile news service, delivered via SMS, was launched in Finland in 2000. Mobile news services are expanding with many organisations providing "on-demand" news services by SMS. Some also provide "instant" news pushed out by SMS. Mobile telephony also facilitates activism and public journalism being explored by Reuters and Yahoo![9] and small independent news companies such as Jasmine News in Sri Lanka.Companies like Monster.com are starting to offer mobile services such as job search and career advice. Consumer applications are on the rise and include everything from information guides on local activities and events to mobile coupons and discount offers one can use to save money on purchases. Even tools for creating websites for mobile phones are increasingly becoming available.Mobile payments were first trialled in Finland in 1998 when two Coca-Cola vending machines in Espoo were enabled to work with SMS payments. Eventually the idea spread and in 1999 the Philippines launched the first commercial mobile payments systems, on the mobile operators Globe and Smart. Today mobile payments ranging from mobile banking to mobile credit cards to mobile commerce are very widely used in Asia and Africa, and in selected European markets. For example in the Philippines it is not unusual to have one's entire paycheck paid to the mobile account. In Kenya the limit of money transfers from one mobile banking account to another is one million US dollars. In India paying utility bills with mobile gains a 5% discount. In Estonia the government found criminals collecting cash parking fees, so the government declared that only mobile payments via SMS were valid for parking and today all parking fees in Estonia are handled via mobile and the crime involved in the activity has vanished.Mobile Applications are developed using the Six M's (previously Five M's) service-development theory created by the author Tomi Ahonen with Joe Barrett of Nokia and Paul Golding of Motorola. The Six M's are Movement (location), Moment (time), Me (personalization), Multi-user (community), Money (payments) and Machines (automation). The Six M's / Five M's theory is widely referenced in the elecoms applications literature and used by most major industry players. The first book to discuss the heory was Services for UMTS by Ahonen & Barrett in 2002.In addition to the battery, GSM mobile phones require a small microchip, called a Subscriber Identity Module or SIM Card, to function. proximately the size of a small postage stamp, the SIM Card is usually placed underneath the battery in the rear of the unit, and (when properly activated) stores the phone's configuration data, and nformation about the phone itself, such as which calling plan the subscriber is using. When the subscriber removes the SIM Card, it can be re-inserted into another phone and used as normal.Each SIM Card is activated by use of a unique numerical identifier; once activated, the identifier is locked down and the card is permanently locked in to the activating network. For this reason, most retailers refuse to accept the return of an activated SIM Card.Those cell phones that do not use a SIM Card have the data programmed in to their memory. This data is accessed by using a special digit sequence to access the "NAM" as in "Name" or number programming menu. From here, one can add information such as a new number for your phone, new Service Provider numbers, new emergency numbers, change their Authentication Key or A-Key code, and update their Preferred Roaming List or PRL. However, to prevent someone from accidentally disabling their phone or removing it from the network, the Service Provider puts a lock on this data called a Master Subsidiary Lock or MSL.The MSL also ensures that the Service Provider gets payment for the phone that was purchased or "leased". For example, the Motorola RAZR V9C costs upwards of CAD $500. You can get one for approximately $200, depending on the carrier. The difference is paid by the customer in the form of a monthly bill. If the carrier did not use a MSL, then they may lose the $300–$400 difference that is paid in the monthly bill, since some customers would cancel their service and take the phone to another carrier.The MSL applies to the SIM only so once the contract has been completed the MSL still applies to the SIM. The phone however, is also initially locked by the manufacturer into the Service Providers MSL. This lock may be disabled so that the phone can use other Service Providers SIM cards. Most phones purchased outside the US are unlocked phones because there are numerous Service Providers in close proximity to one another or have overlapping coverage. The cost to unlock a phone varies but is usually very cheap and is sometimes provided by independent phone vendors.Having an unlocked phone is extremely useful for travelers due to the high cost of using the MSL Service Providers access when outside the normal coverage areas. It can cost sometimes up to 10 times as much to use a locked phone overseas as in the normal service area, even with discounted rates. T-Mobile will provide a SIM unlock code to account holders in good standing after 90 days according to their FAQ.For example, in Jamaica, an AT&T subscriber might pay in excess of US$1.65 per minute for discounted international service while a B-Mobile (Jamaican) customer would pay US$0.20 per minute for the same international service. Some Service Providers focus sales on international sales while others focus on regional sales. For example, the same B-Mobile customer might pay more for local calls but less for international calls than a subscriber to the Jamaican national phone C&W (Cable & Wireless) company. These rate differences are mainly due to currency variations because SIM purchases are made in the local currency. In the US, this type of service competition does not exist because some of the major Service Providers do not offer Pay-As-You-Go services. [Needs Pay-As-You-Go references, rumored T-Mobile,Verizon provide one, AT&T does not as of 12/2008]arketobile phone manufacturers' market share in Q3/2008In Q3/2008, Nokia was the world's largest manufacturer of mobile phones, with a global device market share of 39.4%, followed by Samsung (17.3%), Sony Ericsson (8.6%), Motorola (8.5%) and LG Electronics (7.7%). These manufacturers accounted for over 80% of all mobile phones sold at that time.[11]Other manufacturers include Apple Inc., Audiovox (now UTStarcom), Benefon, BenQ-Siemens, CECT, High Tech Computer Corporation (HTC), Fujitsu, Kyocera, Mitsubishi Electric, NEC, Neonode, Panasonic, Palm, Matsushita, Pantech Wireless Inc., Philips, Qualcomm Inc., Research in Motion Ltd. (RIM), Sagem, Sanyo, Sharp, Siemens, Sendo, Sierra Wireless, SK Teletech, T&A Alcatel, Huawei, Trium and Toshiba.[citation needed] There are also specialist communication systems related to (but distinct from) mobile phones.MediaThe mobile phone became a mass media channel in 1998 when the first ringing tones were sold to mobile phones by Radiolinja in Finland. Soon other media content appeared such as news, videogames, jokes, horoscopes, TV content and advertising. In 2006 the total value of mobile phone paid media content exceeded internet paid media content and was worth 31 Billion dollars (source Informa 2007). The value of music on phones was worth 9.3 Billion dollars in 2007 and gaming was worth over 5 billion dollars in 2007 (source Netsize Guide 2008 [12]).The mobile phone is often called the Fourth Screen (if counting cinema, TV and PC screens as the first three) or Third Screen (counting only TV and PC screens). It is also called the Seventh of the Mass Media (with Print, Recordings, Cinema, Radio, TV and Internet the first six). Most early content for mobile tended to be copies of legacy media, such as the banner advertisement or the TV news highlight video clip. Recently unique content for mobile has been emerging, from the ringing tones and ringback tones in music to "mobisodes," video content that has been produced exclusively for mobile phones.The advent of media on the mobile phone has also produced the opportunity to identify and track Alpha Users or Hubs, the most influential members of any social community. AMF Ventures measured in 2007 the relative accuracy of three mass media, and found that audience measures