2. <operating system> Atari ST and Macintosh equivalents of a Unix "panic" or Amiga guru, in which icons of little black-powder bombs or mushroom clouds are displayed, indicating that the system has died. On the Macintosh, this may be accompanied by a decimal (or occasionally hexadecimal) number indicating what went wrong, similar to the Amiga guru meditation number. MS-DOS computers tend to lock up in this situation.
3. <software> A piece of code embedded in a program that remains dormant until it is triggered. Logic bombs are triggered by an event whereas time bombs are triggered either after a set amount of time has elapsed, or when a specific date is reached.