- output format
- output formatter
- output gap
- output homomorphism
- output indicator
- output label
- output line
- output list
- output medium
- output message
- output mode
- output order
- output peripheral
- output port
- output priority
- output procedure
- output process
- output program
- output queue
- output rate
- output record
- output redirection
- output request
- output resistance
- output routine
- output specifications
- output speed
- output state
- output stream
- output subroutine
- output subsystem
- output tape
- outside
- outwards
- oval
- oval shaped
- overconvergence
- overcurrent
- overcurrent protection
- overdue tasks
- OS-2
- oscillating component
- oscillating curve
- oscillating field
- oscillating memorance
- oscillating series
- oscillating sort
- oscillation
- oscillation constant
- oscillation point
- oscillator
- oscillatory
- oscilloscope
- osculating conic
- osculating coordinates
- osculating parabola
- osculating sphere
- osculatory interpolation
- otherwise
- out-gate
- outage
- outboard bearing
- outbox
- outer automorphism
- outer join
- outer sleeve
- outgoing
- outgoing access
- overhead transportation
- overlap
- overlap window
- overlapped memories
- overlapping
- overlay image
- overlay module
- overlay network
- overlay planes
- overlay program
- overlay structure
- overlay supervisor
- overload characteristic
- overpunching
- overring
- overrun
- overshoot
- overtyping
- overvoltage suppressor
- overwrite
- own
- own coding
- oxyarc
- p-adic
- p-analytic
- pacing window
- Pacioli Luca
- package name
- packed field
- packed key
- packet assembly
- packet procedures