Tuesday is the second chip listed in the chipedium.
In the second chapter of the Sitekick Saga, Dr. Frantic introduces the Chip Creator - a machine that will create programmed Chips to make the Sitekick useful. Things quickly get out of hand, thanks to Dr. Frantic’s experimental monster pellets, leading to one of the best cliffhanger endings in the series.
Of interest: the Monster Sitekick destroys the Chip Creator at the end of this episode.