PTI may refer to:
Arts and entertainment Pardon the Interruption, an American television sports show PTI, a musical group on the WTII Records label
Organizations Pakistan Tehreek-e-Insaf, a Pakistani political party founded in 1996 by Imran Khan Partai Tionghoa Indonesia (Chinese Indonesian Party), a political party in the Dutch East Indies Pennsylvania Transportation Institute, a research unit of Pennsylvania State University's College of Engineering Philippine Tobacco Institute, a Philippine trade association Piedmont Triad International Airport, an American airport Pittsburgh Technical Institute, an American two-year technical college Portugal Telecom International, a division of Portugal Telecom, a Portuguese telecommunications service provider Post-Tensioning Institute, an American non-profit trade organization Powertech Technology Inc., Taiwanese semiconductor assembler Premier Travel Inn, the former name of the British hotel chain Premier Inn Press Trust of India, an Indian news agency, headquartered in Delhi Public Technical Identifiers, the corporation responsible for maintaining the Internet's unique identifiers on behalf of ICANN as a successor to the Internet Assigned Numbers Authority
Science and technology Page-table isolation, a Linux kernel feature that mitigates the Meltdown security vulnerability Palomar Testbed Interferometer, a long-baseline interferometer at the American Palomar Observatory in San Diego County, California, US PAMP-triggered immunity, an immunity response to pathogen-associated molecular pattern (PAMPs) microbial epitopes in plants Periodical technical inspection of vehicles Proof Tracking Index, used to measure the electrical breakdown (tracking) properties of an insulating material Ti plasmid (pTi), a circular plasmid used in creation of transgenic plants
Other uses Parent-teacher interview, a short conference between students' parents and teachers Physical training instructor, an instructor in physical fitness Pretrial Intervention Program, a program for first-time offenders in New Jersey, US Produce Traceability Initiative, a program to track produce through the supply chain
See also PT1 (disambiguation)