[dajt]

In the early 90s we ported our COBOL software from the Wang VS to various typs of UNIX by purchasing and extending a Wang VS runtime emulator.

Then I wrote a terminal emulator for Windows 3.1 that would parse the forms sent down by the runtime and display them as something that looked like a Windows app. This wasn't too difficult because mini & mainframe systems present data entry pages a whole screen at a time, like a windows form.