Stored program control

Stored program control (SPC) is a telecommunications technology for telephone exchanges. Its characteristic is that the switching system is controlled by a computer program stored in a memory in the switching system. SPC was the enabling technology of electronic switching systems (ESS) developed in the Bell System in the 1950s, and may be considered the third generation of switching technology. Stored program control was invented in 1954 by Bell Labs scientist Erna Schneider Hoover, who reasoned that computer software could control the connection of telephone calls.[1][2][3]

  1. ^ Alpha Doggs (2008-02-15). "Phone switching pioneers to be inducted in National Inventors Hall of Fame". Network World. Retrieved 2012-06-17.
  2. ^ "Erna Schneider Hoover". Maximumpc.com. 2012-06-17. Retrieved 2012-06-17.
  3. ^ "Erna Schneider Hoover". Global History Network of IEEE. 2012. Retrieved 2012-06-17.