Comment by rbanffy

> “No. Too many jobs running. Please kill one to continue”

A thing no other computer had ever done before, so, they had to come up with the idea in the first place - a brand new idea. But it was not only that - IIRC, the alarm happened when the OS (a tiny sliver of software not many computers even had at the time) skipped a less important task so it could run the more important ones before their configured deadlines.