• Photographic Activity Test, an ISO standard test
• Portable appliance testing, an electrical safety test
• Powder-actuated tool, a type of nail gun

Computing edit

• PAT (model checker) (Process Analysis Toolkit)
• Page attribute table, in x86 and x86-64 memory caching
• Performance acceleration technology, an Intel memory performance technology
• Port address translation, a type of network address translation
• Program Association Table, in an MPEG transport stream
• Personal access token, a password alternative

Medicine and biology edit

• Paddington alcohol test, for alcohol-related problems
• Paroxysmal atrial tachycardia, an episode of arrhythmia that begins and ends abruptly
• Peripheral Arterial Tone, a noninvasive measure
• Phosphinothricin acetyltransferase, an enzyme
• Photoacoustic tomography, by an ultrasound scan
• Picture arrangement test
• Process analytical technology, in pharmaceutical manufacturing
• Pseudotropine acyltransferase, an enzyme
• Putrescine aminotransferase, an enzyme

• Pat, Hungary, a village
• Patince (Hungarian: Pat), a village in Slovakia
• Pat, Iran, a village in Iran
• Pat, Jerusalem, a neighborhood in Israel
• Pat River, Thailand
• Port Arthur, Texas, US

• Patricia, a female given name
• Patrick (given name), a male given name
• Narcisse Théophile Patouillard (1854–1926) (standard botanical abbreviation "Pat."), French pharmacist and mycologist
• Jenny Pat (1981–2014), Hong Kong-born, Chinese-Canadian international art dealer, visual artist, and television personality

• P.A.T. Network, a Bolivian TV channel operated by the company Periodistas Asociados de Televisión; See Justa Canaviri
• "Pat" (album), 1957 studio album by Pat Boone

Fictional characters edit

• Pat (Alice's Adventures in Wonderland), a gardener
• Pat (Saturday Night Live), an androgynous character
• Postman Pat, a British children's TV character
• Pat, from the Czech series Pat & Mat
• Pat the Dog, a character from the TV show of the same name
• Pat, AKA Lucky's Dad, a character from the Australian cartoon Bluey
• Pat, a character who is Jake the Dog’s daughter-in-law and Kim Kil Whan‘s wife in the animated series Adventure Time

• Pakistan Awami Tehrik, a political party
• Polish Telegraphic Agency, the official news agency of Poland between 1918 and 1991
• Port Authority of Thailand
• Professional Association of Teachers, the former name of the UK trade union Voice

• Jay Prakash Narayan Airport (IATA airport code), Patna, India
• Patricroft railway station (National Rail station code), England
• Port Authority Transit, former name of the Port Authority of Allegheny County, Pennsylvania, US

• Pat, a form of physical intimacy
• Pat silk, a type of silk
• Point after touchdown, in American football
• Prodotto agroalimentare tradizionale, an Italian grade of Protected Geographical Status
• Profit After Tax
• Pat hand, in the card game of poker

• Ex-pat, a person residing in a country other than their native country
• I = PAT, in environmental impact
• Patricia (disambiguation)
• Patrick (disambiguation)
• PATS (disambiguation)
• Patt (disambiguation)