|
gptkbp:instance_of
|
gptkb:computer
|
|
gptkbp:architecture
|
16-bit
|
|
gptkbp:bus_connections
|
gptkb:Unibus
|
|
gptkbp:compatibility
|
PDP-11 software
|
|
gptkbp:discontinued
|
gptkb:1980
|
|
gptkbp:form_factor
|
rack-mounted
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
PDP-21
|
|
gptkbp:influenced
|
subsequent computer designs
|
|
gptkbp:influenced_by
|
gptkb:PDP-10
|
|
gptkbp:input_output
|
serial and parallel ports
|
|
gptkbp:manufacturer
|
gptkb:Digital_Equipment_Corporation
|
|
gptkbp:market_segment
|
mid-range computers
|
|
gptkbp:memory_type
|
core memory
|
|
gptkbp:notable_feature
|
modular design
expandable memory
support for real-time processing
multiple I/ O options
|
|
gptkbp:notable_users
|
gptkb:Lawrence_Livermore_National_Laboratory
gptkb:AT&_T
gptkb:General_Electric
gptkb:IBM
gptkb:Stanford_University
gptkb:University_of_California
gptkb:Bell_Labs
gptkb:MIT
gptkb:Los_Alamos_National_Laboratory
gptkb:NASA
|
|
gptkbp:operating_system
|
gptkb:RSX-11
|
|
gptkbp:predecessor
|
gptkb:PDP-20
|
|
gptkbp:processor
|
1 MHz
|
|
gptkbp:programming_language
|
Assembly language
|
|
gptkbp:release_year
|
gptkb:1970
|
|
gptkbp:successor
|
gptkb:PDP-22
gptkb:microprocessor
|
|
gptkbp:used_in
|
government agencies
academic institutions
research laboratories
|
|
gptkbp:user_base
|
gptkb:engineers
gptkb:students
gptkb:scientists
|
|
gptkbp:bfsParent
|
gptkb:Digital_Equipment_Corporation
|
|
gptkbp:bfsLayer
|
4
|