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Wireless communication is the transfer of information between two or more points that are not connected by an electrical conductor.
The most common wireless technologies use radio. With radio waves distances can be short, such as a few meters fortelevision or as far as thousands or even millions of kilometers for deep-space radio communications. It encompasses various types of fixed, mobile, and portable applications, including two-way radios, cellular telephones, personal digital assistants (PDAs), and wireless networking. Other examples of applications of radio wireless technology include GPSunits, garage door openers, wireless computer mice, keyboards and headsets, headphones, radio receivers, satellite television, broadcast television and cordless telephones.
Somewhat less common methods of achieving wireless communications include the use of other electromagneticwireless technologies, such as light, magnetic, or electric fields or the use of sound.
The term wireless has been used twice in communications history, with slightly different meaning. It was initially used from about 1890 for the first radio transmitting and receiving technology, as in wireless telegraphy, until the new wordradio replaced it around 1920. The term was revived in the 1980s and 1990s mainly to distinguish digital devices that communicate without wires, such as the examples listed in the previous paragraph, from those that require wires. This is its primary usage today.
A mobile phone is a telephone that can make and receive calls over a radio frequency carrier 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). Most modern mobile telephone services use a cellular network architecture, and therefore mobile telephones are often also called cellular telephones or cell phones. In addition totelephony, modern mobile phones support a variety of other services, such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, gaming, and photography. Mobile phones which offer these and more general 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. 4.4 lbs (2 kg). 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 100% of the global population and reaching the bottom of the economic pyramid. In 2014, the top mobile phone manufacturers were Samsung, Nokia, Apple, and LG.
Johnstown is a city and the county seat of Fulton County in the U.S. state of New York. As of the 2010 Census, the city had population of 8,743. The city was named after its founder, Sir William Johnson.
The city of Johnstown is mostly surrounded by the town of Johnstown, of which it was once a part when it was a village. Also adjacent to the city is the city of Gloversville. The two cities are together known as the “Glove Cities”. They are known for their history of specialty manufacturing. Johnstown is located approximately 45 miles (72 km) west of Albany, about one-third of the way between Albany and the Finger Lakes region to the west.
Johnstown, originally “John’s Town”, was founded in 1762 by Sir William Johnson, a Baronet who named it after his son John Johnson. William Johnson came to the British colony of New York from Ireland in 1732. He was a trader who learned American Indian languages and culture, forming close relationships with many Native American leaders. He was appointed as the Superintendent of Indian Affairs, as well as a major general in the British forces during the French and Indian War (Seven Years’ War). His alliances with the Iroquois were significant to the war.
As a reward for his services, Johnson received large tracts of land in what are now Hamilton and Fulton counties. He established Johnstown and became one of New York’s most prosperous and influential citizens. He was the largest landowner in the Mohawk Valley, with an estate of more than 400,000 acres (1,600 km2) before his death. Having begun as an Indian trader, he expanded his business interests to include a sawmill and lumber business, and a flour mill that served the area. Johnson, the largest slaveholder in the county and perhaps in the state of New York, had some 60 enslaved Africans working these businesses. He also recruited many Scots-Irish tenant farmers to work his lands. Observing Johnson’s successful business endeavors, the local Native American inhabitants dubbed him Warragghivagey, or “he who does much business.”