MS1
# MS1

MS1 may refer to:

* FMA Ae. M.S.1, an air ambulance version of the 1932 Argentine FMA AeC.2 utility aircraft
* MS1, the first device in tandem mass spectrometry

MS-1 may refer to:

* Mercury-Scout 1, a 1961 satellite
* Mississippi's 1st congressional district
* Mississippi Highway 1
* Roland MS-1 Digital Sampler
* T-18 tank
* A type of Trams of Putilov plant
* MegaSquirt 'n Spark-Extra (MS1/Extra), a type of MegaSquirt electronic fuel injection controller
* MS-1 (wrestler), Mexican professional wrestler
* Metres per second, the SI unit of velocity, written as $ms^{−1}$
* A first year medical student
* MS-1 (spaceplane), a proposed US Spaceplane
