Re: MSDOS/Apple DOS prankage
Back in the days of pre-history, when terminal access to a computer was rare, we used to use "GE 635 BASIC PLUS". One of our guys wrote a neat little programme that emulated the "system screen", so "Library" commands would reply with the location of the nearest Public Library, "Run" would be met with "Please WALK in the corridors" and so on. Each command received a smart reply and did nothing. It frequently took users several minutes to realise that they were looking at the output from a programme, rather than at the actual system terminal output!