relay-switching system
41North American Numbering Plan — NANPA redirects here. For other uses, see Nanpa (disambiguation). This article is about the numbering plan. For a list of area codes under the plan, see List of North American Numbering Plan area codes. The North American Numbering Plan (NANP) is …
42Mesa Boogie — The Mesa Boogie logo Mesa/Boogie (also known as Mesa Engineering) is a company in Petaluma, California that makes amplifiers for guitars and basses. It has been in operation since 1969. Mesa was started by Randall Smith as a small repair shop… …
43TRS-80 — For the Chicago based electronica group, see TRS 80 (group). TRS 80 Model I with Expansion Interface Release date August 3, 1977 (1977 08 03) …
44SP-1 switch — SP 1 (Stored Program 1) was the name of a computerized telephone exchange (a so called switching office) manufactured by Northern Electric (later Northern Telecom and now Nortel Networks beginning in 1972) in Canada. It was introduced around 1967 …
45Mobile telephony — Mobile phone tower Mobile telephony is the provision of telephone services to phones which may move around freely rather than stay fixed in one location. Mobile phones connect to a terrestrial cellular network of base stations (cell sites),… …
46Hitchhiker Program — The Hitchhiker Program (HH) was a NASA program established in 1984 and administered by the Goddard Space Flight Center (GSFC) and the Marshall Space Flight Center (MSFC). The program was designed to allow low cost and quick reactive experiments… …
47Packet Assembler/Disassembler — A packet assembler/disassembler, abbreviated PAD is a communications device which provides multiple asynchronous terminal connectivity to an X.25 (packet switching) network or host computer. It collects data from a group of terminals and places… …
48Bell Laboratories — U.S. research and development company (founded 1925) that develops telecommunications equipment and carries out defense related research. Formerly part of AT&T, it now belongs to Lucent Technologies, Inc., which spun off from AT&T in 1996. Bell… …
49Gilbert Vernam — Gilbert Sandford Vernam (1890 ndash; 7 February 1960) was a AT T Bell Labs engineer who, in 1917, invented the stream cipher and later co invented the one time pad cipher. Vernam proposed a teletype cipher in which a previously prepared key, kept …
50List of inventors — This is a list of inventors. See also: List of scientists, Timeline of invention, List of inventions named after people, List of inventors killed by their own inventions, and . Alphabetical list compactTOC NOTOC A * Vitaly Mikhaylovich Abalakov,… …
