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- Nova 3
- NuBus
- Nuclear Data
- Null modem
- ODS2
- ODT
- OEM
- OMNIBUS
- OS
- OS/2
- OS/2 2.0
- OS/360
- OS/8
- OS/MFT
- OS/MVT
- OSPF
- OTB
- Object-code
- Object-oriented
- Object code
- Octal Debugging Technique
- Octet
- Ohm
- Ohm's Law
- Ohm's law
- Ohms Law
- Old C Changes
- Olivetti
- Olivetti M700-10
- Omnibus
- One's-complement
- One's complement
- Ones-complement
- Ones complement
- Op-code
- Op code
- Opcode
- Open-source
- Open-source software
- OpenBSD
- OpenVMS
- Open Collector
- Open Shortest Path First
- Open collector
- Open collector output
- Open source
- Open source software
- Openbsd
- Operand
- Operating System
- Operating environment
- Operating system
- Operation
- Operation code
- Operator
- Operator's console
- Operator's panel
- Optical fiber
- Optimal coding
- Optimal programming
- Optimum coding
- Optimum programming
- Order
- Order code
- Original Equipment Manufacturer
- Original equipment manufacturer
- Oscilloscope
- Other Resources
- Out-of-order execution
- Out of order execution
- Over-the-back
- Over-the-top
- Over the back
- Over the top
- Overlay
- Overpowered
- PA-RISC
- PAL
- PALM
- PARC
- PARC Universal Packet
- PASCAL
- PB-250
- PB250
- PB 250
- PC
- PC-DOS
- PC-compatible
- PC/370
- PC04
- PC04/PC05 High-Speed Paper-Tape Reader/Punch
- PC04/PC05 Paper-Tape Reader/Punch
- PC04B
- PC04P
- PC04R
- PC04 Paper-Tape Reader/Punch
- PC04 Reader/Punch
- PC05
- PC05C
- PC05P
- PC05R
- PC05 Paper-Tape Reader/Punch
- PC05 Reader/Punch
- PC11
- PC11 Control
- PC11 Controller
- PC11 High-Speed Paper-Tape Reader/Punch Control
- PC11 High-Speed Paper-Tape Reader/Punch Controller
- PC11 control
- PC11 controller
- PC11 high-speed paper-tape reader/punch control
- PC11 high-speed paper-tape reader/punch controller
- PCB
- PCI
- PCL11
- PCL11 Communications System
- PCLSRing
- PC Rogue
- PC compatible
- PCem
- PDP
- PDP-1
- PDP-1-X
- PDP-1-X Time Sharing System
- PDP-10
- PDP-10 I/O Bus
- PDP-10 I/O bus
- PDP-10 Memory Bus
- PDP-10 core images
- PDP-10 memories
- PDP-10 memory bus
- PDP-11
- PDP-11/03
- PDP-11/04
- PDP-11/05
- PDP-11/10
- PDP-11/15
- PDP-11/20
- PDP-11/23
- PDP-11/23+
- PDP-11/23-PLUS
- PDP-11/23 PLUS
- PDP-11/24
- PDP-11/34
- PDP-11/34A
- PDP-11/35
- PDP-11/40
- PDP-11/40E
- PDP-11/44
- PDP-11/45
- PDP-11/50
- PDP-11/53
- PDP-11/55
- PDP-11/60
- PDP-11/70
- PDP-11/73
- PDP-11/74
- PDP-11/83
- PDP-11/84
- PDP-11/93
- PDP-11/94
- PDP-11 Absolute Loader
- PDP-11 Architecture
- PDP-11 Bootstrap Loader
- PDP-11 C stack operation
- PDP-11 Commercial Instruction Set
- PDP-11 Extended Instruction Set
- PDP-11 Memory Management
- PDP-11 architecture
- PDP-11 family differences appendix
- PDP-11 memory management
- PDP-11 stack limit
- PDP-11 stacks
- PDP-12
- PDP-15
- PDP-2
- PDP-3
- PDP-4
- PDP-5
- PDP-6
- PDP-7
- PDP-7 UNIX
- PDP-7 Unix
- PDP-8
- PDP-8/A
- PDP-8/E
- PDP-8/F
- PDP-8/I
- PDP-8/L
- PDP-8/M
- PDP-8/S
- PDP-8 Architecture
- PDP-8 Memory Expansion units
- PDP-8 Memory Extension units
- PDP-8 architecture
- PDP-8 family
- PDP-9
- PDP-9 control memory
- PDP-K
- PDP-X
- PDP11
- PDP11GUI
- PDT-11 Intelligent Terminal Family
- PE
- PHOENIX
- PL/1
- PL/I
- PLA
- PLATO
- PMI
- PMI bus
- PMI memories
- PPP
- PRIMOS
- PRNET
- PRNet
- PRO/VENIX
- PROM
- PROMs
- PS
- PS/2
- PS/2 Model 60 Sales Brochure
- PS/2 model 30
- PS/2 model 35
- PS/2 model 50
- PS/2 model 60
- PS/2 model 70
- PS/2 model 80
- PSW
- PUP
- PWB
- PWB-UNIX
- PWB/1
- PWB/UNIX
- PWB/Unix
- PWB1
- Pack
- Packard Bell PB 250
- Packed decimal
- Packet
- Packet-switch
- Packet-switching
- Packet-switching network
- Packet Radio
- Packet Radio Network
- Packet forwarding
- Packet header
- Packet radio
- Packet radio network
- Packet switch
- Packet switching
- Packet switching network
- Page
- Page fault
- Page frame
- Page table
- Pager
- Paging
- Paging box
- Paper-tape
- Paper Tape
- Paper tape
- Papertape
- Parallel
- Parallel computer
- Parallel interface
- Parallel port
- Parity
- Parser
- Pascal
- Passive
- Patching OS/2 for fast machines
- Path Vector
- Path selection
- Pcc
- Pcemu
- Pdp-11
- Pdp-8
- Pentium
- Pentium I
- Peripheral
- Peripheral Component Interconnect
- Peripheral controller
- Peripheral processor
- Permanent magnet
- Personal Computer
- Personal computer
- Pertec tape interface
- Phantom
- Phar Lap
- Phase
- Phase-encoded
- Phase Encoded
- Phase Encoding
- Phase encoded
- Phase encoding
- Phototypesetter C
- Physical address
- Physical network
- Pilot ACE
- Pin
- Pipe
- Pipe-line
- Pipeline
- Pipelining
- Pixel
- Planetfall
- Platter
- Playing DUNGEON on VMS V1.0
- Plug
- Plug-compatible
- Plug compatible
- Point-to-Point Protocol
- Pointer
- Poll-driven I/O
- Poll driven I/O
- Polling
- Polling I/O
- Port
- Port Expander
- Port expander
- Portability
- Portable
- Position-independent
- Position-independent code
- Position independent
- Position independent code
- PostScript
- Postscript
- PowerPC
- Power 6/32
- Power harness
- Power supply
- Pre-emptive multi-tasking
- Pre-emptive multitasking
- Preemptive multi-tasking
- Preemptive multitasking
- Previous
- Primary memory
- Primary storage
- Prime 750
- Prime Computer
- Printed Circuit Board
- Printed circuit board
- Printer