various types of antennas
11Electrical connector — Back of an audio amplifier features a variety of electrical connectors An electrical connector is an electro mechanical device for joining electrical circuits as an interface using a mechanical assembly. The connection may be temporary, as for… …
12Magnet — This article is about objects and devices that produce magnetic fields. For a description of magnetic materials, see magnetism. For other uses, see Magnet (disambiguation) …
13British Telecom microwave network — The British Telecom microwave network was a network of point to point microwave radio links in the United Kingdom, operated at first by the General Post Office, and subsequently by its successor BT plc. From the late 1950s to the 1980s it… …
14Lego Rock Raiders — was a Lego theme started 1999, and was discontinued in 2000. Rock Raiders was the only theme in the Lego Underground series. The theme, while short lived, featured sixteen sets and was backed up by numerous story related media, including several… …
15Copper wire and cable — Copper has been used in electric wiring since the invention of the electromagnet and the telegraph in the 1820s.[1][2] The invention of the telephone in 1876 proved to be another early boon for copper wire.[3] Today, despite competition from… …
16Ground (electricity) — In electrical engineering, ground or earth may be the reference point in an electrical circuit from which other voltages are measured, or a common return path for electric current, or a direct physical connection to the Earth. A typical earthing… …
17Billboard — For the magazine, see Billboard (magazine). For other uses, see Billboard (disambiguation). Billboards on Times Square, New York …
18Defence Electronics Research Laboratory — Established 1961 Director Sri G.Boopathy Staff 12 DEFENCE INTELEGENCE ARE ON WORK Address Chandrayangutta Lines, Hyderabad 500005 …
19Boeing RC-135 — RC 135 An RC 135 Rivet Joint reconnaissance aircraft moves into position behind a KC 135 Stratotanker for aerial refueling. Role …
20Signals intelligence in modern history — This article is a subset article of the article Signals intelligence, which addresses the unifying conceptual and technical factors and common technologies in this intelligence discipline. This article deals with signals intelligence in the… …
