PEX (disambiguation)

PEX is cross-linked polyethylene, a form of polyethylene with cross-links.

PEX or Pex may also refer to:

Science and technology

 * Peer exchange, a method to gather peers for BitTorrent
 * PHIGS Extension to X, in programming
 * Pex, a unit testing framework for the .NET programming languages
 * Pex, a digital rights technology company
 * Physical examination, in medicine
 * Plasma exchange, a form of plasmapheresis
 * Pseudoexfoliation syndrome, condition related to glaucoma
 * Parasitic extraction, tool in IC Layout Design, used for extract parasitic elements and see their effects on the circuit

Other

 * Palestine Exchange, a stock exchange
 * People Express Airlines (1980s)
 * PEX, operators of OPEX stock exchange
 * Pex, a character in the Doctor Who story Paradise Towers
 * The Polar Express, a children's book and related film, video game and soundtrack