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Quake-like game made with JavaScript takes up just 13KB of storage
(www.tomshardware.com)
This is a most excellent place for technology news and articles.
Wow you did not disappoint. I think I will make a TIL post about playing doom from bios. I should probably get to that now before tomorrow or it wont count as a TIL.
There's whole category of software that runs without OS, look up "bare metal", for example you can run web server on raspberry pi pico and connect it to ps4 to have offline jailbreak capabilities, mind you, raspberry pi pico have 264kb of ram and 2mb of memory (up to 16mb) and dual core 133mhz cpu