OP1 or OP-1 may refer to:
- Opus number 1
- Op. 1 (disambiguation), a list of compositions that are assigned this number
- Bone morphogenetic protein 7 or BMP7, also known as osteogenic protein-1 or OP-1
- Pitcairn OP-1, a first rotary-wing aircraft
- Teenage Engineering OP-1, a portable synthesizer
- a clade in the Branching order of bacterial phyla (Rappe and Giovanoni, 2003)
- Rockchip RK3399, a Rockchip processor used in Chromebooks, marketed as OP1
- OP1 grade tea, see Tea leaf grading § Grades
- OP1, the highest possible Overall Position (OP) that high school graduates can receive in Queensland, Australia
Topics referred to by the same termThis disambiguation page lists articles associated with the same title formed as a letter–number combination.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: