The three-letter abbreviation AMP can refer to the following:

• In biology, the nucleotide adenosine monophosphate
• As a flavour enhancer, the nucleotide adenosine monophosphate
• AngryMutantPenguin, a famous fan of The Elder Scrolls
• In computing, an audio decoding engine made by Tomislav Uzelac and others, which stood at the basis of or inspired:
• AMP, an audio player made by PlayMedia Systems, Inc.
  • Winamp
  • Zinf (formerly FreeAMP)
• A brand of electrical and electronic connectors, part of Tyco Electronics.
• AMP Limited is an Australian company providing insurance, investment and other financial services.