Other
- Apc, Hungary, a village in the Heves County of Hungary
- A Perfect Circle, a rock band
- Alkali pozzolan cement
- Ambulatory Payment Classification
- Antipop Consortium, an American hip-hop group
- Argon plasma coagulation, an endoscopic technique for controlling hemorrhage
- Atari Punk Console, a simple DIY noisemaker circuit
- Attoparsec, an unusual unit of measurement
- Australian Provincial Championship, a rugby union competition in Australia
- Automatic Performance Control, a system that was used on some Saab H engines
- Average propensity to consume, the proportion of income spent
- Napa County Airport (IATA airport code), near Napa, California
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