How 'bout GeoWorks on Commodore C-64 machine with 64k total RAM - at 1.2MHz - MEGA-Hertz!!!??...

- phwew! no hard drive either...
man, I'm having a difficult time getting me-self up off me land-lubber floor!...
That, and some spreadsheet and database that ate up floppy disk after floppy disk... and The Hunt For Red October on 2 floppies... ah yesh... good times, good times... sigh...

- two-button mouse! almost forgot about that one...
My least favorite computer thingies was probably AS/400, after having gotten used to a gui on a C-64, Amiga, Mac, and Windows... but man, it was powerful... "Robust" was a term they used back then. Not anymore... "Today, Corporation XYZ has announced another 3.2 million customers were exposed in its latest data breach"... so let's trot Edge out there...