What are some seven-letter operating systems?

21 of the 128 operating systems in Icillion have exactly 7 letters, for example Windows, Android and watchOS.

Which seven-letter operating systems start with F?

F is the most common first letter here, with 3 names, such as FreeBSD, FreeDOS and Fuchsia.

Computer Science · lists

Stuck on a crossword or a word game? 21 operating systems have exactly 7 letters, from “AmigaOS” to “Windows”.

21 of the 128 operating systems have exactly 7 letters (16%).
Most start with F (3), M (3) and S (3).
Only names of one word are counted, and only their letters: spaces, hyphens and apostrophes are not.

What are some seven-letter operating systems?: 21 of the 128 operating systems in Icillion have exactly 7 letters, for example Windows, Android and watchOS.
Which seven-letter operating systems start with F?: F is the most common first letter here, with 3 names, such as FreeBSD, FreeDOS and Fuchsia.

How deep does your knowledge go?

Seven prompts a day, twenty seconds each. Obvious answers float on the tip of the iceberg; rare ones sink all the way to the trench.