10biForthOS = 10b(2) i(nstructions) Forth OS is a very primitive Forth with only two instructions:<p><pre><code> 1 is compile
0 is execute
</code></pre>
It is heavily inspired by Frank Sergeant 3-Instruction Forth (<a href="https://pygmy.utoh.org/3ins4th.html" rel="nofollow">https://pygmy.utoh.org/3ins4th.html</a>)