APT (plural APTs)
- Initialism of automation presses tooling.
- Initialism of advanced packaging tool.
- (Britain, rail transport) Initialism of advanced passenger train.
- Abbreviation of apartment. The US Postal Service prefers APT, but Apt. is also seen
- Initialism of arbitrage pricing theory.
- Initialism of automatically programmed tool.
- (Britain, healthcare) Initialism of anatomical pathology technologist.