| Answer | Crossword Clue |
|---|---|
| RFDS | Country mail systems, for short |
| ACS | Cooling systems for short, |
| STEREOS | Binaural systems, for short |
| PAS | Sound systems, for short |
| HIFIS | Sound systems, for short |
| PAS | Speaker systems for short, |
| PAS | Speaker systems, for short |
| PAS | Audio systems, for short |
| ISMS | Belief systems, for short |
| ESCS | Keys pressed to exit systems, for short |
