Question

What is another word for operating system?

Answer 1

Some people, and companies like Apple. like to refer to it as the "System software."
It could also be referred to as firmware in some cases

Answer 2

Firmware is different. It is the software used by microcontrollers of various hardware in your computer. DVD Writers are a very common example of such hardware.

Answer 3

Often abbreviated to O/S. The core functions are bound into the "kernel"

Answer 4

Apart from the ones mentioned above, "Executive" was used by some companies back in the 80s, 90s and early 00s.