nanobsd, picobsd, tinybsd

[John Smith]

Can anybody please explain to my what the differences are between
nanobsd, picobsd and tinybsd.

They all seem to be doing the same (creating a minimal FreeBSD image
that can be used in embedded systems), or is this not right?

I've searched the internet but can't really find a page that clearly
explains the differences and similarities.

Many thanks in advance,

JJGS