I remember way back when at a show a presenter was talking about multi-tasking he had 3 balls in his had.
MS-DOS (IE PC hardware of the time)- he placed 2 balls behind his back and waved the 1 ball in the air.
MAC- he toss 1 ball in the air then stop it grab the next ball and toss it but at all times he had the 3 balls seen but only 1 was juggled.
Amiga- he started juggling 3 balls and talking about how the amiga was only truly multi-tasking home machine of it's time.
I always liked that presentation
:-D