I did some co-op work terms at a spinoff company of Noma Outdoor that made development tools (CASE) for Wang, other minicomputers, workstations, and mainframes. The Wang office sharing system and terminals were exceptionally nice. The terminals were programmable in PL/I and had multi-session capability where the PL/I terminal code could manipulate data between sessions.

Now that I think of it, my high school had a Wang computer as well with dual large (much larger than 5.25") floppy disks with vertical slots in separate box/cabinet, and a 2256 looking terminal (integrated keyboard, green screen, slightly sloped sides). I mostly used the Tandy TRS-80 Model III's though.