Tem or TEM may refer to:

• Threat and error management, an aviation safety management model.
• Telecom Expense Management
• Telecom Equipment Manufacturer
• TEM (currency), local to Volos, Greece
• TEM (nuclear propulsion), a Russian spacecraft propulsion system
• Territorial Efficiency Medal, a United Kingdom award for long service in the Territorial Army
• Test environment management, a function in the software delivery process
• Test For English Majors, like College English Test in China
• Tram Elettrici Mendrisiensi, a former tramway in Ticino, Switzerland
• Transient electromagnetics
• Transmission electron microscopy (or microscope)
• Transverse electromagnetic mode, a transverse mode
• Trans-European Motorways, a regional project
• Triethylenemelamine, a chemotherapeutic agent

• Atum or Tem, an Egyptian deity
• Tem (ibedul), high chief of Koror
• Tem (queen), an ancient Egyptian queen consort
• Tem people of Togo, living around Sokodé
• Temmie Chang, artist and character in Undertale and Deltarune

• Tem, Tajikistan, a small town just outside Khorugh in the Gorno-Badakhshan Autonomous Province
• Temora Airport (IATA airport code TEM)

• Pro tem, abbreviation of a Latin phrase for a person who acts as a placeholder
• Tem language
• TEM beta-lactamase

• All pages with titles containing tem
• All pages with titles beginning with Tem
• All pages with titles beginning with TEM
• TEMS (disambiguation)