| Binary system |
| PC linkup system |
| Alkaline ecosystems |
| ___ system (blood classification) |
| Air conditioning conduit |
| Diagnostic lab system |
| Feature of Melvil Dewey's book classification system |
| Buy now, pay later" system |
| System with dots and dashes |
| Cookie conduit? |
| Allowing some ventilation, say |
| Airline with missile defense systems |
| Aircraft-detection system |
| System of fixed attention, contemplation, concentration. |
| Paris underground system |
| America's economic system |
| Conduits from a reservoir. |
| Shorthand system introduced in 1888 |
| Electronic detection system |
| All systems go" signals |
| Fuel conduit |
| Ravine-crossing hauling systems |
| Maker of the Lynx and Jaguar systems |
| Audio system component |
| ''All systems go,'' in letters |
| Airborne prescription-delivery system? |
| System espoused by tyrants |
| Internet writing system that popularized "pwn'd |
| System for linking computers |
| Part of most stereo systems |