A computer company delivering the national identity card scheme was frantically hunting yesterday for a lost computer drive containing 5,000 personnel files, including the private details of prison officers.

A copy of the computer drive, or part of the computer drive, was kept from which the deleted files could later be retrieved if required.

The video floppy disks later had several reader devices available for viewing on a screen, but were never standardized as a computer drive.

But as a test of eye-to-hand co-ordination and timing, surely modern computer driving games are just as challenging, or more so.

Software running on the computer drives the terminal node controller.