I would just like to take this opportunity to let people know that the creator of Damn Small Linux has revived the project recently with a larger but modern yet still damn small distro.

https://www.damnsmalllinux.org/

If they used mescc-tools, gnu mes and M2libc.

They could have had a full Unix environment in even less space

Wow, it (1.3mb) can fit on a single 3.5" floppy.