office, department, division, program, institute, center — Lowercase when not part of the official name.

see academic departments/offices

off-site — Hyphenated. Also: on-site.

on — Do not use before a date or day of the week. Exception: when its absence would cause confusion.

The workshop was held Monday.

On Sept. 7, the office will close for the holiday.

Margaret called Ted on Tuesday.

online — not on-line or on line