| Binary system |
| Alkaline ecosystems |
| PC linkup system |
| ___ system (blood classification) |
| Feature of Melvil Dewey's book classification system |
| Buy now, pay later" system |
| Natural ingredient in Kleenex Soothing Lotion tissues |
| Diagnostic lab system |
| System with dots and dashes |
| Acts nervous |
| Abnormal tissue growth |
| Appeasing words from a nervous postman? |
| Nervous first-time husband-to-be? |
| Act nervously |
| Airline with missile defense systems |
| System of fixed attention, contemplation, concentration. |
| Paris underground system |
| Aircraft-detection system |
| Shorthand system introduced in 1888 |
| Artificial tissue generation materials |
| America's economic system |
| Electronic detection system |
| Ravine-crossing hauling systems |
| All systems go" signals |
| Nervous Nellie's condition |
| Audio system component |
| Airborne prescription-delivery system? |
| Maker of the Lynx and Jaguar systems |
| System espoused by tyrants |
| Internet writing system that popularized "pwn'd |