CCTV of Texas prisoners breaking out to save guard
10 July 2016 Last updated at 11:18 BST
Banked on a wall beside the keys are CCTV screens displaying 32 different corners of the college and below that are ledgers cataloguing health-threatening mishaps, actual and potential. There's a lot of potential for accidents in this three-acre warren of slippery cobbles, curling staircases and medieval cellars where over 500 sometimes inebriated people study in term-time.
NOUN
1[MASS NOUN] A system for converting visual images (with sound) into electrical signals, transmitting them by radio or other means, and displaying them electronically on a screen:the days before television[AS MODIFIER]: a television camera
1.1The activity, profession, or medium of broadcasting on television:she has a job in television[AS MODIFIER]: television news
1.2Television programmes:Dan was sitting on the settee watching televisionNorman was on television yesterday
2(also television set)A device with a screen for receiving television signals:a colour televisionshe turned the television up
Origin
Early 20th century: from
tele- 'at a distance'
+ vision.
ABBREVIATION
Closed-circuit television.
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