MOP can refer to:
- Modern Persian, in linguistics
- Macanese pataca, the ISO 4217 code for the currency of Macau
- Maintenance Operations Protocol, in computer networks
- Measure of Performance
- Means of Production in Economics
- Megatron x Optimus Prime, in fandoms
- Metaobject Protocol, in computer science
- M.O.P., (Mash Out Posse) hip-hop artists
- Massive Ordnance Penetrator munition
- Manual of Practice
- Method of Procedure
- Master of Puppets
- Mathematical Olympiad Program
- Mother of Pearl
- Muriate of potash, also known as potassium chloride, potash muriate, and potassium muriate
- Most Outstanding Player
- memory organization packet
- Maximum Operating Pressure in a Pipeline
- Movement of the People, a Nigerian political party created by Fela Kuti to support his candidacy for President of Nigeria.
- Money Oriented Programming
See also: Mop
