(n) all-season track
(n) (uk) common grackle (Quiscalus quiscula)
(n) oxytetracycline
(n) (comp) Office95
(n) (comp) office computer
(n) office landscape
(n) off-off-Broadway
(n) (comp) off-line meeting
(n) (comp) object program
(n) (comp) object module
(n) (comp) object library
(n) optoelectronics
(n) (comp) optomechanical mouse
(n) operation center
operation centre
(n) operation twist
(n) operations research
(n) opposition party
(n) orientation
(n) original content
(adj-no) orthopanchromatic
(n) (comp) on-board computer
(n) (comp) on-line job-hunting
(n) online auction
(n) (comp) online computer
(n) (comp) on-line sign up
online sign-up
(n) online shopping
(n) (comp) online software
(n) (comp) on-line database
online database
(n) (comp) online debugging
(n) (comp) online backup