PES may refer to:

  • Packetized elementary stream, part of the MPEG communication protocol
  • Party of European Socialists, a pan-European political party
  • Passenger Environment Survey, quality-control system for transit systems
  • Payment for ecosystem services
  • People's Education Society Institute of Technology
  • Performance Enhancement Specialist, Issued by National Academy of Sports Medicine
  • Pes anserine bursitis, inflammatory of the inner knee at the bursa of the pes anserinus
  • PES (director), film director and animator
  • Photoemission spectroscopy, a measurement of a substance's binding energy using the photoelectric effect
  • Polyester, an artificially produced organic chemical that is spun and woven to make fabric
  • Polyethersulfone, a thermoplastic polymer
  • Potential energy surface, in physics and chemistry
  • Power Engineering Society, the oldest society of the Institute of Electrical and Electronics Engineers (IEEE) focused on the scientific and engineering knowledge about electric power and energy
  • Premier Election Solutions, formerly Diebold Election Systems
  • Price elasticity of supply in Economics
  • Pro Evolution Soccer (series), a multi-platform video game
  • Programmed electrical stimulation, a type of electrophysiologic study
  • Providence Elementary School, an elementary school in Chesterfield County, VA
  • Proposed Encryption Standard
  • Psychiatric Emergency Services
  • PULHHEEMS, a system of grading physical and mental fitness used by Britain's armed forces

Pes may refer to:

  • Pes (zoology), Latin for "foot" (body part), thus used in anatomy to mean "foot" (or analogous body part)
  • Pes (unit), a Roman unit of length measurement roughly corresponding with a foot
  • Pes (village), a former urban-type settlement in Novgorod Oblast, Russia; since 1999—a village