Poor Joe is just too big to fit on a computer without falling off. That and since I left home, no one else is around to let him up to sleep in the living room 
What is that creature in the background?
Looks like a Gorilla Mask to me.
What? You don’t keep your gorilla mask near your computer? Where DO you keep it? What if you need it suddenly, while on the Straight Dope? I even have a spare in my drawer.
I have a monster mask on the shelf in the closet, within easy reach. It has matching feet and hands, also nearby. I hope that counts. 
Hmm, that gives me an idea for the next Doper pic thread!
Exactly - where else would it be handy when you need it?
Callie also used to sit on our old cable TV converter (it heated up in use and I think she thought it was a bunwarmer), which we wouldn’t have minded except she usually managed to sit directly on one of the manual channel change buttons on the top. We’d be watching TV and suddenly it would start flipping through all the channels.
My cat has very upset about this thread and has some very choice words on
the the subjuect :
"advbghmmjh,h,.i//;p mjihvll88888
9999 sa9.
That’s all that need to be said.
When I went looking for my new computer desk I got one with a slide-out keyboard tray. Best move I ever made. Now I can have up to 6 cats on the desk and still type, although Cricket will still try to reach down and add her comments to whatever I am typing.
For that problem, you need this:
which automatically detects cat-like typing and locks your keyboard.
My favorite picture is yellowval’s dog!
I have a slide-out tray as well, but since the cats usually* only want to be there when we are, and that’s when the tray is pulled out, it doesn’t help much. Nixie did blow up a German Panzer IV tank once, by stepping on the F key at just the right time when I was playing Steel Panthers, but I can’t count how many times I’ve discovered my turn in Civ has unexpectedly come to a sudden end due to a cat who has decided he/she wants lovies NOW and jumped up on the space bar. (Yes I save my games a lot - why do you ask?)
*They don’t insist on our presence if they just want to bask in the warmth from the monitor. (For cat servant Dopers with similar problems, I finally solved both the “cat fur in the cooling vents” issue and the “cat sliding off the sloping back end of the monitor and knocking over everything on the desk” issue by building a padded shelf that sits over the monitor, gently warmed from below by the rising heat.)