I loved RISC OS. I got the computer in '87 or' 88, while at university. Such smooth multitasking for its time. For school work that involved writing some programs, I fired up the PC emulator in order to run Turbo Pascal. It was sweet seeing a virtual PC running in a window while doing other things in other windows. Writing graphics programs with GUIs (Acorn C) instead of just creating image files like most of the other students did was fun too.