Why are the Odyssey 2, the CDTV and the APF-1000 marked as computers?

The Odyssey 2 and CDTV at least *were* computers - the O2 had a full keyboard, and adding a floppy drive to the CDTV made it a fully capable Amiga.

The APF-M1000 had a computer add-on (the Imagination Machine), but I wouldn't consider the console itself a computer.

And the Odissey 2 was build to run only games, right?

(I mean... a keyboard doesn't make it a computer... a keyboard can be attached to the Dreamcast, but this don't make it a computer).

The C64 was also built specifically to run games, and I don't think there's any confusion there :-)

And this lead us to the classic question about what is a computer and is a console.

Well, I think consoles are always plug'n'play. You don't have to configure nothing before start playing your videogame.

In the Commodore, you must load the game first. In the Odyssey 2, you plug the cartridge and play.

Consoles offers non-gaming activities as bonuses (internet on Palystation 2). Computers offers gaming as a bonus (play Turrican in the same machine your daddy works).

Well, this is what I think. I just wanna see MESS always growing. Thanks for this fantastic emulator, all of you.

Actually that definition doesn't work either - lots of computers had cartridge slots (TI99, VIC-20, C64, C128, Atari 400/600/800/1200, IBM PCjr, and probably one or two I'm forgetting).

In MESS's case the computer/console distinction is actually used to determine if the keyboard defaults to full or partial emulation, so it really means "something with a keyboard" vs. "something without". So it's a little misnamed.