Smalltalk. You can fork any block IIRC. Edit: sorry, I posted reflexively before reading other comments. Turns out I'm not the only one who values Smalltalk to

Smalltalk. You can fork any block IIRC. Edit: sorry, I posted reflexively before reading other comments. Turns out I'm not the only one who values Smalltalk to the extent that I actually want to remember something about it :)