Syst. of laws |
Syst. of unspoken words |
Data-sharing syst. |
Soundless communication syst. |
Syst. |
Nonverbal syst. |
Communication syst. for the hearing-impaired |
Computer syst. |
Raytheon syst. |
Communication syst. with hand signals |
Handmade syst.? |
Metric measurement syst. |
Blood-typing syst. |
Syst. with gestures |
Broadcasting syst. |
Handy communication syst.? |
Handmade communication syst.? |
Silent communication syst. |
Defense syst. |
Syst. for the hearing-impaired |
Syst. of measurement |
Syst. with hand signals |
Life support syst.? |
Google Earth mapping syst. |
Schedule-shifting syst. |
Dactylology syst. |
Increased-clarity syst. |
Blood type syst. |
Spring forward, fall back" syst. |
Syst. first implemented during W.W. I |