Johnniac computer
E874574
The Johnniac computer was an early vacuum-tube, stored-program computer built at the RAND Corporation in the 1950s, notable for its long operational life and use in pioneering artificial intelligence research.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
early computer
ⓘ
scientific computer ⓘ stored-program computer ⓘ vacuum-tube computer ⓘ |
| architectureType | binary ⓘ |
| basedOn | IAS architecture ⓘ |
| clockFrequency | approximately 1 MHz (order of magnitude) ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| developer | RAND Corporation NERFINISHED ⓘ |
| fieldOfUse |
artificial intelligence research
ⓘ
computer science research ⓘ operations research at RAND ⓘ |
| fundedBy | U.S. Air Force (partially) NERFINISHED ⓘ |
| hasComponent |
console with switches and lights
ⓘ
magnetic drum (secondary storage) ⓘ |
| hostedProject |
Logic Theorist
NERFINISHED
ⓘ
early AI theorem proving programs ⓘ |
| influenced | later RAND computing projects ⓘ |
| influencedBy | EDVAC design concepts ⓘ |
| inputDevice |
paper tape
ⓘ
punched cards ⓘ |
| inspiredBy | IAS machine NERFINISHED ⓘ |
| instructionSetType | single-address architecture ⓘ |
| locationBuilt | Santa Monica, California NERFINISHED ⓘ |
| memoryType |
Williams tube electrostatic memory
ⓘ
magnetic-core memory (later upgrade) ⓘ |
| namedAfter | John von Neumann NERFINISHED ⓘ |
| notableFor |
long operational life
ⓘ
use in early artificial intelligence research ⓘ use in numerical analysis ⓘ use in systems research ⓘ |
| numeralSystem | two's complement binary ⓘ |
| operatedBy | RAND Corporation NERFINISHED ⓘ |
| operationalLifetime | approximately 13 years ⓘ |
| outputDevice |
line printer
ⓘ
paper tape punch ⓘ |
| primaryMemorySize |
256 words (initially)
GENERATED
ⓘ
4096 words (after upgrades) GENERATED ⓘ |
| programStorage | in-memory stored program ⓘ |
| technology |
diodes
ⓘ
vacuum tubes ⓘ |
| usedFor |
artificial intelligence experiments
ⓘ
mathematical simulations ⓘ operations research ⓘ symbolic computation ⓘ |
| wordLength | 40-bit ⓘ |
| yearConstructionStarted | 1950 ⓘ |
| yearDecommissioned | 1966 ⓘ |
| yearFirstOperational | 1953 ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Logic Theorist