SR1, SR-1, SR.1 or Sr1 may refer to: __NOTOC__ Science and mathematics SR1 RNA, a small RNA produced by bacteria SR1, a candidate phylum of bacteria more commonly known as Absconditabacteria Symmetric rank-one, a mathematical algorithm

Products and technology HDR-SR1, a Sony camcorder Peugeot SR1, a hybrid concept car Radical SR1, a sports car Vintage Ultralight SR-1 Hornet, an American homebuilt aircraft VR Class Sr1, a class of Finnish electric locomotives VSR SR-1 Snoshoo, an American Formula One racing aircraft design Six Chuter SR1, an American powered parachute design SR1, a FIA Sportscar Championship classification SR1, a 4-stroke Yamaha motorcycle SR.1, a semi-rigid airship built in 1918 for the British navy SR-1 Freedom, a nuclear-powered spacecraft proposed by NASA SR-1 Vektor, a Russian pistol

Media Saints Row (2006 video game) Slime Rancher (2017 video game) SR1 Europawelle, a music station operated by Saarländischer Rundfunk (Saarland Broadcasting)

Other Spelling Reform 1, an Australian English-language spelling reform proposal State Route or State Road 1; see List of highways numbered 1