I also remember the first version of Smalltalk from Digitalk that was character based and windowed. It was called Methods. I can’t seem to find any reference to it on the web now.
As an “enterprise” developer in the 80’s, we all had beepers to go along with our suits and ties. People often thought we must be doctors, but we were just corporate mainframe developers.
I worked for a few banks starting in the 1980’s. It was all MVS. End user applications were created using CICS and IMS. What we used to call OLTP (online transaction processing).
Along with DESQView and IBM’s TopView as already mentioned, this reminded me of the first version of PC Smalltalk put out by Digitalk that was called “Smalltalk Methods”. It was a character based windowed Smalltalk.
This was quickly followed with the full bit mapped windowed Smalltalk/V. I believe all of this was when MS Windows still only had tiled windows without overlap.