PLT

PLT may stand for:
 * Patent Law Treaty
 * Plantronics, stock symbol
 * Platelet count, in blood test reports
 * Power line communication or power line telecommunications
 * Princeton Large Torus, a nuclear fusion reactor
 * Programming language theory, in computer science
 * PLT Scheme, a programming language
 * PrettyLittleThing, fashion brand
 * Procedure Linkage Table, a programming concept related to GOT.