I have some old DOS-based stock-taking software that has been working for years but needs to be ported to the web to remove the hassle of maintaining and updating it across old and new machines.

Porting it to something like this instead of reworking the interface completely could help speed up the process and users wouldn't be disturbed by the switch.

Sounds silly, but sometimes these old, primitive interfaces are all you need.

EDIT: anyone knows of other libraries that simulate terminals?