MMT
MMT stands for:
- Modern Monetary Theory , a stream of post-Keynesianism in which the analysis of the monetary system is central
- Multiple / Magnum Mirror Telescope , a mirror telescope in Arizona
- Miqtzat Ma'ase ha-Torah, a script from Qumran, see 4QMMT
- MultiMode gear
- (Methylcyclopentadienyl) manganese tricarbonyl , a gasoline additive that increases octane rating instead of lead additives.