PTI

PTI may refer to:

The arts

Pacific Torah Institute, a Canadian yeshiva high school, located in Vancouver, British Columbia
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, located near Greensboro, North Carolina
Pittsburgh Technical Institute, an American two-year technical college, located in Oakdale, Pennsylvania
Play Ten Interactive, a Russian publisher and developer of interactive entertainment software for personal computers, headquartered in Moscow
Portugal Telecom International, a division of Portugal Telecom – a Portuguese telecommunications service provider, headquartered in Lisbon
Post-Tensioning Institute, an American non-profit trade organization, headquartered in Farmington Hills, Michigan
Premier Travel Inn, the former name of Premier Inn – a British hotel chain, headquartered in Luton, England
Press Trust of India, an Indian news agency, headquartered in Delhi
Powertech Technology Inc., also known as PTI, 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, located at the American Palomar Observatory in San Diego County, California
PAMP-triggered immunity, an immunity response to microbial epitopes (pathogen-associated molecular pattern (PAMPs)) in plants
Proof Tracking Index, another term for the Comparative 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

Parent-teacher interview, a short conference between students' parents and teachers
Physical Training Instructor, a term used primarily in the British Armed Forces and British police, as well as some other Commonwealth countries
Physical Training Instructor (Singapore Armed Forces)
Pre-trial intervention program, designed for first-time offenders of non-violent crimes
Pre-tax income, another term for earnings before taxes