digital switching company
71History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
72Stromberg-Carlson — This article is about Stromberg Carlson, the American telephone equipment manufacturing company. For the phone phreak with a similar name, see Strom Carlson. Stromberg Carlson was a telecommunications equipment manufacturing company formed in… …
73NBC — This article is about the television network. For NBC Philippines, see Nation Broadcasting Corporation. For other uses, see NBC (disambiguation). National Broadcasting Company (NBC) Type …
74CBS — This article is about the broadcast network. For its parent company, see CBS Corporation. For other uses of CBS, see CBS (disambiguation). CBS Broadcasting Inc. (CBS) Type …
75Electricity meter — Typical North American domestic analog electricity meter …
76automation — /aw teuh may sheuhn/, n. 1. the technique, method, or system of operating or controlling a process by highly automatic means, as by electronic devices, reducing human intervention to a minimum. 2. a mechanical device, operated electronically,… …
77electronics — /i lek tron iks, ee lek /, n. (used with a sing. v.) the science dealing with the development and application of devices and systems involving the flow of electrons in a vacuum, in gaseous media, and in semiconductors. [1905 10; see ELECTRONIC,… …
78Vendor lock-in — Marketing Key concepts Product marketing · Pricing …
79Telegraphy — (from the Greek words (τηλε) = far and (γραφειν) = write) is the long distance transmission of written messages without physical transport of letters. Radiotelegraphy or wireless telegraphy transmits messages using radio. Telegraphy includes… …
80transistor — /tran zis teuhr/, n. 1. Electronics. a semiconductor device that amplifies, oscillates, or switches the flow of current between two terminals by varying the current or voltage between one of the terminals and a third: although much smaller in… …
