(n) (comp) authoring software
(n) Aboriginal languages (of Australia)
(n) order entry
(n) (comp) autoscaling
(n) auto-changer (tape recorder)
(n) (comp) auto-decrement
(n) autopoiesis
(n) owner-pilot
(n) oven toaster
toaster oven
(n) open ticket
(n) open account
(n) open market
(n) (comp) Ostwald color system
(n) off-site centre (center)
(n) offside trap
(n) (comp) object class
(n) (comp) object code
(n) (comp) object identifier
(n) obstruction
(n) optical art
(n) operant conditioning
(n) operant conditioning
(n) (comp) Oracle 8i
(n) original print
(n) (comp) originate mode
(n) olistostrome
(n) (comp) on-site service
onsite service
(n) (comp) on-site support
(n) (comp) online event
(n) maximum value in games (e.g. 99, 255, etc.) (wasei: counter stop)