At work, I use Windows, and I use emacs all the time; it's among the first programs I start after logging in. On top of everything else, it has a builtin "shell

At work, I use Windows, and I use emacs all the time; it's among the first programs I start after logging in. On top of everything else, it has a builtin "shell" that is a reasonable approximation to a Unix shell. (At home, I use GNU/Linux, though.)