MR1
# MR1

MR1 or MR-1 may refer to:

* Bristol M.R.1, an experimental biplane
* HAWAII MR1, a sea floor imaging system
* Major histocompatibility complex, class I-related
* Mercury-Redstone 1, an unsuccessful unmanned American space mission
* PNKD, or myofibrillogenesis regulator 1
* Shewanella oneidensis MR-1, a bacterium
* Hadoop architecture Map/Reduce version 1
