Related Clues:
- __ airbags (car safety feature)
- Two-star system
- Like some track meets or exhausts
- Based on two
- Like some citizenship
- Kind of citizenship
- Like computer code
- Having a double purpose
- Consisting of 1s and 0s
- __-purpose: serving two functions
- With 39-Across, kind of engine
- Two-pronged
- Janus-faced
- Like a Jekyll/Hyde personality
- Part of DINK