PTM

PTM may refer to:


 * Parent-teacher meeting, a meeting of parents with teachers to discuss the progress of school students
 * President's Tatrakshak Medal, a military decoration of the Indian Coast Guard
 * Pashtun Tahafuz Movement, a human rights movement in Pakistan for the Pashtun people
 * Polygyny threshold model, a theory explaining polygyny
 * Polynomial texture mapping, a digital imaging technique
 * Portugal. The Man, an American rock band
 * Post-translational modification, covalent and generally enzymatic modification of proteins following protein biosynthesis by ribosomes
 * Post-transition metal, a grouping of chemical elements
 * Probabilistic Turing machine
 * Pulse-time modulation, an alternative name for Pulse-width modulation