period when a system is unavailable
| DOWNTIME |
List of words for the clue period when a system is unavailable from the crossword:
INUSE ERA OUT NOTIN EON TIEUP TIEDUP TAKEN INTRUST INAVAILABLE ICICLE ICANT ELEC DRYUP COPY BUSY BLT LENT EPOCH 
Snapshots of the past: 1902
Snapshots of the past: 1911