Proton (disambiguation)

A proton is a subatomic particle.

Proton may also refer to:

In chemistry

 * Proton, the hydron ion (notated )
 * Proton, hydronium (also called hydroxonium) ion (notated )
 * Proton-pump inhibitor, a group of drugs
 * Proton conductor, an electrolyte
 * Proton-coupled electron transfer, a chemical reaction mechanism
 * Proton spectrum, the nuclear magnetic resonance spectrum of the 1H nucleus

In sports and entertainment

 * Proton Competition, a German auto racing team
 * Proton F.C., football club in the Malaysian Premier League sponsored by the carmaker that existed between 1986 and 2009
 * Proton Radio, an internet electronic music station

In technology

 * Ozone Proton, a French paraglider design
 * Protei-5 Russian diver propulsion vehicle called a "Proton", Russian diver propulsion vehicle
 * Proton (rocket family), Russian uncrewed space vehicle design
 * Proton-K, a rocket
 * Proton-M, a rocket
 * Proton satellite, Soviet satellite
 * Proton-transfer-reaction mass spectrometry, a technique to monitor volatile organic compounds online
 * Proton (software), a Wine-based compatibility tool for Linux
 * Products of the company Proton AG
 * ProtonMail, an encrypted email service
 * ProtonVPN, a VPN service
 * Original name of the BBC Micro microcomputer
 * Proton, a model of diving equipment made by Siebe Gorman

In business

 * Proton AG, a Swiss company offering privacy-focused online services
 * Proton (debit card), a discontinued electronic debit card from Belgium
 * Proton Bank, an investment bank in Greece
 * Proton Electronic a Taiwanese manufacturer of consumer audio and video equipment founded in 1964
 * Proton Holdings, a Malaysian car producer

Other uses

 * USS Proton (AG-147), a US Navy tank landing ship
 * Professor Proton, a fictional scientist in The Big Bang Theory television series universe
 * Proton (band), an Australian rock band