2 ms·

iirc the mentioned smalltalk browser predates both of these.

• kragen 4y ago
  Correct, the Burroughs B20 is from 01982, the Sinclair QL is from 01984, and Smalltalk's class browser (pictured on the HolonForth page and cited in the text as a key inspiration) was already more or less in its current form in 01976, the biggest difference from today being that the screen was one bit per pixel, not grayscale or color. (The Smalltalk language and virtual machine have changed enormously, but the browser is almost unchanged.) I think Smalltalk-72 did not have the browser.