Dilgirl seems to have missed the joke about someone misspelling Catbert as Carbert in the earlier post. But that was all a long time ago and does not matter now.
I remember that series. That was a different cat though. It was an orange and black striped stray cat that wandered in and took up residence in Dilbert's house. Catbert is someone that Dogbert hired from outside at one of the various times he ran the company.
Wow, that made me wonder.. Catbert is never shown living at Dilbert's house, right? But that's where he began - pouncing on the keyboard after being yanked off Ratbert. Does he still live there? Do he, Ratbert, Dogbert and Dilbert all carpool to work?