Bootstrappable language

Chuck> Were there ever any tiny Algol-60 subsets marketed? Well, there's DECUS Algol for the PDP-11 (which, according to comments, apparently was originally done for the PDP-8). That's a variation of Burroughs 5500 Algol, so it's pretty powerful. It uses bytecode; roughly speaking, you can think of those as 16-bit analogs of the B6700 instruction set. I wouldn't call that tiny; it's actually a substantial superset of standard Algol. And the bytecode interpreter is pretty large because of that. But you can use it to write substantial programs -- the compiler itself for example. That's not particularly doable with standard Algol-60. I have a copy of the Algol source code for that thing, but unfortunately I have misplaced the bytecode interpreter. It almost certainly lives on an old magtape; the problem is finding and then reading that tape... paul