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The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...
ACD - Automatic Call Distribution; Articulation score; B. Blue box - a device that was used to bypass the normal long-distance call switching tones typically used to obtain free calls. C. Call originator - (or calling party, caller or A-party) a person or device that initiates a telephone call by dialling a telephone number.
Despite the move to all-figure STD codes, and although the former Director areas were merged into single dialling codes and stated as all-figure numbers, until the 1990s it remained standard practice in the rest of the United Kingdom to state telephone numbers as exchange name + number, or include the exchange name before the national STD code.
Certificate – X, U, PG, R, G (from the film certificates) Charged – ION. Charlie – C ( NATO phonetic alphabet) Chartered accountant – CA. Chief – CH. Chlorine – CL (chemical symbol) Chromosome – X or Y. Church – CH or CE ( Church of England) or RC ( Roman Catholic) Circa – C.
A vertical service code ( VSC) is a sequence of digits and the signals star (*) and pound/hash (#) dialed on a telephone keypad or rotary dial to access certain telephone service features. [1] Some vertical service codes require dialing of a telephone number after the code sequence. On a touch tone telephone, the codes are usually initiated ...
A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. It is designed to reproduce speech of a quality that is understandable. [1] It is the physical wire or other signaling medium connecting the user's telephone apparatus to the telecommunications network, and ...
Wide Area Telephone Service ( WATS) was a flat-rate long-distance service for customer dial-type telecommunications in the service areas of the North American Numbering Plan (NANP). The service was between a given customer phone (also known as a "station") and stations within specified geographic rate areas, employing a single telephone line ...
Philipp Reis, 1861, constructed the first telephone, today called the Reis telephone. Alexander Graham Bell was awarded the first U.S. patent for the invention of the telephone in 1876. Elisha Gray, 1876, designed a telephone using a water microphone in Highland Park, Illinois.