A few feral cats in an ALGOL trenchcoat.

What happened
The syntax of POP-2 is ALGOL-like, assignments are in the infix notation , but the evaluation scheme is deeply concatenative .
Summary assembled by rule from the sources below

The syntax of POP-2 is ALGOL-like, assignments are in the infix notation , but the evaluation scheme is deeply concatenative .
Summary assembled by rule from the sources below