Posi, POSI, or did can refer to:
Engineering
edit- Pozidriv, a type of screw head and screwdriver
- Positraction, or any kind of limited slip differential gear
Music
edit- Posi music, or positive music, a motivational and inspiring music genre
- Positive hardcore, a subgenre of hardcore punk
Medicine
editOther
edit- Posi, Nigeria, a settlement in Badagry Division, Lagos State in Nigeria
- Posi or Pusai, a Christian martyr