Applied Digital Data Systems
| Company type | Division (after 1980) |
|---|---|
| Industry | Computer terminals, computer hardware |
| Predecessor | Solid State Data Sciences (related company founded by Leeam Lowin) |
| Founded | 1969 |
| Founder | Leeam Lowin, William J. Catacosinos |
| Fate | Acquired by SunRiver Data Systems |
| Parent | NCR Corporation (from 1980), later AT&T |
Applied Digital Data Systems, Inc. (ADDS) was established in 1969 by Leeam Lowin and William J. Catacosinos as a manufacturer specializing in video display computer terminals. Notably, Lowin also founded Solid State Data Sciences (SSDS), an early pioneer in the development of MOS/LSI integrated circuits that played a vital role in ADDS's product line.
In 1980, ADDS became a division of NCR Corporation, which introduced the Mentor 2000 professional computer to the United States market in 1986. This system was equipped with a 5 MHz Zilog CPU, 640 KB of RAM, a 60MB hard disk, and operated on the Pick operating system along with its database management system. It was capable of supporting either 16 or 32 video terminals concurrently.
Subsequently, ADDS and NCR became part of AT&T, followed by a brief period as an independent entity before being acquired by SunRiver Data Systems. The Pick operating system variant developed by these companies was later purchased by Pick Systems Inc (currently TigerLogic) and rebranded as mvBase, which was eventually sold to Rocket Software in 2013.