Properties (45)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
computer
|
| gptkbp:architect |
word-oriented architecture
|
| gptkbp:busConnections |
gptkb:Unibus
|
| gptkbp:coolingSystem |
air-cooled
|
| gptkbp:expansion |
multiple Unibus slots
|
| gptkbp:formFactor |
rack-mounted
|
| gptkbp:historicalSignificance |
influenced modern computing architectures
pioneered time-sharing systems contributed to the development of AI research supported early networked computing used in early computer graphics research |
| https://www.w3.org/2000/01/rdf-schema#label |
PDP-20 Model D
|
| gptkbp:inputOutput |
printers
serial and parallel ports keyboards punch cards plotters 120 V AC |
| gptkbp:language |
Assembly Language
LISP FORTRAN |
| gptkbp:manufacturer |
gptkb:Digital_Equipment_Corporation
|
| gptkbp:maximumDepth |
128 KB
|
| gptkbp:monitors |
console terminal
|
| gptkbp:network |
gptkb:ARPA_network
|
| gptkbp:notableEvent |
Time-sharing systems
Artificial_Intelligence_programs Dynamic_Modeling_Group_software |
| gptkbp:notableFeature |
time-sharing capabilities
interactive computing support for multiple users multitasking support |
| gptkbp:notableUsers |
gptkb:Harvard_University
gptkb:Stanford_University gptkb:MIT |
| gptkbp:operatingHours |
TOPS-20
WAITS |
| gptkbp:powers |
approximately 2 kW
|
| gptkbp:processor |
gptkb:PDP-20_CPU
|
| gptkbp:RAM |
core memory
|
| gptkbp:releaseYear |
1967
|
| gptkbp:storage |
disk storage
magnetic tape |
| gptkbp:successor |
gptkb:PDP-20_Model_E
|
| gptkbp:weight |
approximately 500 lbs
|