Mobile phone history
A mobile phone, known as a cell phone in North America, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN). Modern mobile telephone services use a cellular networkarchitecture, and, therefore, mobile telephones are called cellular telephones or cell phones, in North America. In addition to telephony, 2000s-era mobile phones support a variety of other services, such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, video games, and digital photography. Mobile phones offering only those capabilities are known as feature phones; mobile phones which offer greatly advanced computing capabilities are referred to as smartphones.
The first handheld mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a handset weighing c. 2 kilograms (4.4 lbs).In 1979, Nippon Telegraph and Telephone (NTT) launched the world's first cellular network in Japan.In 1983, the DynaTAC 8000x was the first commercially available handheld mobile phone. From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billion, penetrating virtually 100% of the global population and reaching even the bottom of the economic pyramid.In first quarter of 2016, the top smartphone developers worldwide were Samsung, Apple, and Huawei(and "[s]martphone sales represented 78 percent of total mobile phone sales").For feature phones (or "dumbphones") as of 2016, the largest were Samsung, Nokia, and Alcatel.
Article on Bill gates Biography and his Profession.
William Henry Gates III born October 28, 1955(seattle Washington US).He is an American business magnate, investor, author, philanthropist, humanitarian, and principal founder of Microsoft Corporation.During his career at Microsoft, Gates held the positions of chairman, CEO and chief software architect, while also being the largest individual share holder until May 2014.
- :Co-Founder and Technology Advisor of Microsoft
- Co-Chairman of the Bill & Melinda Gates Foundation
- CEO of Cascade Investment
- Chairman of Branded Entertainment Network
- Chairman of Terra power.
- Parents: William H.Gates and Sr.Mary Maxwell Gates.His wife name is Melinda Franch.In 1994 they both got married.Net worth of Gates is 91.1billion US$.He has 3 children. His most earnings came from Microsoft company.He is worlds 2nd rich person.
- Website : gatesnotes.com
- Jennifer Katharine Gates(Gates 2nd daughter)
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