About twenty years ago, Adele Goldberg was president of the ACM. She gave a talk to the GBC-ACM, and a Saturday before or after someone held one of those all-day Saturday workshops on Smalltalk. That was my first exposure to Smalltalk and circuitously led to the Mainsail programming language being ported to the Data General 32-bit Eclipse CPU.
The Alto was based on the DG Nova, and Data General was one of the first licensees of Smalltalk, but I never saw Smalltalk running on any DG hardware. Mainsail (a "managed runtime" in today's dry terminology) almost became the primary application development language for DG's workstations. Unfortunately C and Unix had captured a lot of imagination in the early 1980s and DG followed that road, ultimately to destruction, as HP did to Apollo.