Alt or ALT may refer to: Abbreviations for words Alt account, an alternative online identity also known as a sock puppet account Alternate character, in online gaming Alternate route, type of highway designation Alternating group, mathematical group of even permutations Alternative lifestyle Alternative rock Alternative subculture or youth subculture, particularly with regard to fashion or aesthetics ("alt fashion," "alt aesthetics") Altimeter Altitude Acronyms and initialisms Aboriginal Land Trust, a type of organisation in Australia Alanine transaminase, a liver enzyme of the transaminase family Alternative lengthening of telomeres, in cellular biology Approach and Landing Tests, in space transportation Argon laser trabeculoplasty, a type of glaucoma surgery Assistant Language Teacher, in Japan Association for Learning Technology, in Oxford, England Association for Linguistic Typology Accelerated life testing, testing a product in excess of its normal service parameters International Conference on Algorithmic Learning Theory, a conference in theoretical computer science Places and geographical features Alt, Greater Manchester, formerly a constituent parish of Limehurst Rural District, near Oldham, England River Alt, in Merseyside, England Olt (river) (), river in Romania Altoona Transportation Center, Pennsylvania, U.S. (Amtrak code ALT) Altrincham station, in Altrincham, England (National Rail station code ALT) People Alt (surname) A.L.T. (born 1970), Mexican-American rapper André Leon Talley, fashion magazine editor Music ALT (band), Andy White, Liam Ó Maonlaí, Tim Finn ALT (album), a 2012 music album by Van der Graaf Generator ALT (EP), a 2015 EP by Vanna Alt-J, band in alt, singing in the octave above the treble staff (G5 to F6) ALT, a robotic singer with songs in the Bemani game series including Pop'n Music, Reflec Beat and Jubeat Technology Southern Altai language (ISO-639-3 code "alt") Alt attribute, in HTML computer language Alt key, on a computer keyboard ALT Linux, computer software alt.* hierarchy, in USENET newsgroups Other Altbier, German beer Alt (film), a 2013 Venezuelan short film Alt-right, an abbreviation of alternative right, a loosely connected far-right, white nationalist movement based largely in the United States