In MS-DOS, Ctrl+Break could be simulated through ASCII character 0x03. Literally, hit Alt+3 and it would respond the same way. The sysadmin for my high school

In MS-DOS, Ctrl+Break could be simulated through ASCII character 0x03. Literally, hit Alt+3 and it would respond the same way. The sysadmin for my high school computer lab had written a text-mode DOS login screen that would start Windows 3.11 for workgroups after the user logged in. A few of us kids figured out we could just Ctrl+Break out of it and install/play DOOM, Descent 2, etc. He wised up and wrote a trap for the Ctrl+Break sequence, but I discovered the Alt+3 trick and we continued on our merry way. I don't think he ever figured out how we did it. (We also hid our games inside a directory named Alt+255, which appeared as a space. A single space was not allowed as a directory name, so it felt like magic to us.)