Интересный фактик

FACTOID: Did you know your 10D and 300D run DOS? That's right. Embedded in the camera is DataLight's ROM-DOS. In fact, if you use the right tool such as http://www.kyuzz.org/antirez/s10sh.html you can see that inside the camera is an A: and B: drive. On the A: drive reside command.com and autoexec.bat, and most interestingly, camera.exe.

Pentax/HP EI-2000 - там вообще в Doom можно было играть :)