PTI

PTI may refer to:

Arts and entertainment

Pacific Torah Institute, a yeshiva high school in Vancouver, British Columbia, Canada
Pakistan Tehreek-e-Insaf, a Pakistani political party
Pennsylvania Transportation Institute, a research unit of American 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
Premier Travel Inn, the former name of the British hotel chain Premier Inn
Press Trust of India, an Indian news agency, headquartered in Delhi
Powertech Technology Inc., Taiwanese semiconductor assembler
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

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
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
Page-table isolation, a Linux kernel feature that mitigates the Meltdown security vulnerability

Pakistan Tehreek-e-Insaf - Pakistan Political party

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