O
- off campus/off-campus, on campus/on-campus
- Standard hyphenation rules apply to these terms: when used as a modifier, either term must be hyphenated. When campus is used as a noun, drop the hyphen. At UA, on-campus housing is plentiful and convenient. Students who live on campus also find it affordable. That building is located just off campus on Queen City Ave.
- off of
- Don't use "off of," use just "off."
- office
- Capitalize office only when it is part of an official name: Registrar's Office Business Office
- on site
- Two words.
- ordinal numbers
- Numbers used to indicate order (first, second, 10th, 25th, etc.). Spell out first through ninth: fourth grade, first base. Use figures starting with 10th.