21.   Too many hours in front of the computer screen can destroy physical fitness.

22.   Try not to let your computer screen get too cluttered up.

23.   The computer screen lit up and Jonathon typed in a code.

24.   The computer screen is referred to as the monitor.

25.   A message flashed up on my computer screen.

26.   They started out by looking at the computer screens which display the images.

27.   Researchers flash two groups of different letters onto a computer screen.

28.   A far superior approach is to manage the analogue signal in such a way that it can be displayed on a computer screen.

29.   Not only will they see each other and converse in real time but they will be able to share and manipulate together the contents of their computer screens.

30.   Its walls are banked head-high with electronic equipment, dominated by a single computer screen.