SR1

SR1, SR-1, SR.1 or Sr1 may refer to:

• 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

• 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 Vektor, a Russian pistol

• Saints Row (2006 video game)
• SR1 Europawelle, a music station operated by Saarländischer Rundfunk (Saarland Broadcasting)

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