Old operational Synonyms

Definitions for Old

(adjective) being of advanced years and especially past middle age
(adjective) dating or surviving from the distant past
(adjective) having been such at some previous time

OO abbreviation

OO is an abbreviation for Old Operational

What does OO stand for?

OO stands for "Old Operational"

Operational replaced

Definitions for Operational

(adjective) being in effective operation
(adjective) pertaining to a process or series of actions for achieving a result
(adjective) fit or ready for use or service