What kind of computers can be plugged into other computers?

[tingo]

Since it hasn't been mentioned in this thread yet: a ND Butterfly workstation. Yes, another mini-in-a-pc solution.

 

[SiliconClassics]

Yes, in the 90's Sun marketed an SBUS PC card that plugged into their SPARCstation systems called SunPC.

There were several versions - an i486 as well as a Pentium-class (which I think was actually an AMD chip). I own the latter but have not had an opportunity to try it yet.

There were also the substantially more-badass SunPCi cards, which were large full-featured x86 systems on PCI boards that could be used with Sun Ultra systems.

Here's a PDF that explains the design & features of SunPC.

 

[Caluser2000]

This is the exact same card I've got- http://www.john-ward.org.uk/personal/john/computers/html/pc_card.html

There's screenshot of Mac OS running on the PC card on this page - http://www.john-ward.org.uk/personal/john/computers/html/screens.html

 

[njroadfan]

I don't think thats MacOS, that looks like the clean room Executor emulator running under DOS! That wallpaper was its default.

 

[pontus]

I remembered another one. The XT/370. An IBM XT with the ability to run S/370 code.