TM or Tm and variants may refer to:
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TM or
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Weapons
- TM 65 mine, a Finnish anti-tank mine
- TM series of Soviet and Russian anti-tank mines
Other uses in science and technology
- Thematic Mapper, an Earth-observing sensor on a Landsat satellite
- Terametre (Tm), equal to 1012 metres
- TM (triode) (from French Telegraphie Militaire), standard small-signal vacuum tube of the Allies of World War I