There are several pages in Wikipedia that refer to different meanings of Alta:

• ALTA is an acronym for the American Land Title Association, a national trade association representing the land title industry.
• Alta is a town and also is a ski area in Utah, USA.
• Alta is a town in Norway.
• Alta is a Formula One auto racing team.
• The Alta was an English automobile.
• Alta. is an abbreviation for Alberta, a province in Canada.
• Alta or Alta capella, a 20th century musicological term for Renaissance wind ensembles, alta indicating loud (instrumenta, loud instruments).
• Alta is also a common misspelling of the german word Alter, which means "Mate" or "Dude".