The KY-68 can operate via civilian and military switches in either encrypted or un-encrypted mode, or point-to-point (encrypted mode only).
DeMarco started working at Bell Telephone Laboratories in 1963, where he participated in ESS-1 project to develop the first large scale Electronic Switching System, which became installed in telephone offices all over the world.
electronic music | operating system | Electronic Arts | Super Nintendo Entertainment System | Nintendo Entertainment System | Electronic music | Android (operating system) | Global Positioning System | Solar System | X Window System | Electronic Frontier Foundation | Korean Broadcasting System | System of a Down | Domain Name System | electronic dance music | Seoul Broadcasting System | North Carolina Community College System | Mutual Broadcasting System | Bulletin board system | system | Electronic Data Systems | Turner Broadcasting System | Program and System Information Protocol | Geographic information system | Ubuntu (operating system) | Tokyo Broadcasting System | Federal Reserve System | Youth system | Embedded system | solar system |
In the United States the Bell System (American Telephone & Telegraph) also used twistors with permanent magnets as the "Program Store" or main memory in their first electronic telephone switching system, the 1ESS as well as others in the ESS series of electronic telephone switches, and did so up to the 4ESS switch introduced in 1976 and sold into the 1980s.