I'm working through a fairly ancient intro to Smalltalk-80 called "Smalltalk-80 A Practical Introduction" by Philip Gray.
A lot of the methods that Gray uses don't exist in quite the same form in my Squeak (3.9 under Ubunto 10)(*).
I can generally figure it out eventually by studying the browser, but I understood Squeak started out as a clone of the original ST-80? So I wondered where/when the differences came in. And also if there is a crib sheet of what the differences are? (Which would save me some time!)
BTW I've also been using SBE but I wanted to try the examples in the Gray book just for fun...
(*)An example is in PopUpMenu where Gray uses a "reset" message which doesn't seem to exist in Squeak. He also uses a "startUpWithHeading:" which is "startUpWithCaption:" in Squeak.