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core-memory
Magnetic core memory technology used in the Johnniac after upgrading from the experimental Selectron memory.
1 chapter across 1 book
Core Memory: A Visual Survey of Vintage Computers (2007)John Alderman, Mark Richards
NAMEJOHNNIAC
The chapter details the Johnniac computer, a unique IAS-type machine built by Rand Corporation in 1954, inspired by John von Neumann's architecture principles. It highlights the historical context of von Neumann's work on stored program computing, the proliferation of IAS machines worldwide, and the Johnniac's specific features such as its use of a time-sharing operating system and memory upgrades. The Johnniac remains significant as the only complete surviving IAS-type machine besides the original.