(UK, rail transport) A company that operates passenger trains on the mainline railway network in Great Britain under franchise or license from the Government.

plural of operating room table

An operating table.

(US) A small business that produces homemade foods and is partially exempt from the regulations governing larger commercial food operations.

plural of cottage food operation

plural of chief operating officer

plural of net operating income

plural of operational taxonomic unit

(programming) An operator specifying a range of conditions, such that the related code executes only if the first condition is true, and only until the second condition becomes true.

(programming) The operator ## in the C or C++ preprocessor, which permits separate tokens to be joined into a single token.