Comment by Symbiote

RISC OS, the OS from the company that later became ARM, used "application" from at least 1987, and by 1991 that had been abbreviated to "Apps" in some of the UI, although I think we still said "application."

These were school or home computers.

Picture under RISC OS 3: https://en.wikipedia.org/wiki/History_of_RISC_OS