Ricoh Model Name Guide

[Nikolay]

I can say that the “GW” in “GW” and “GW+” controllers stands for “Grand Works”.

No idea what it actually designated, though.

The controller employs GW (Grand Workware) architecture that allows the board to control all applications, including copier, printer, scanner, and fax applications. To add the optional printer, scanner, or fax applications, ROM DIMMs must be installed on the controller.

The GW controller is the heart of many Ricoh devices, acting as an interface between the machine engine and the outside world.
GW stands for Grand WorkWare, and consists of both hardware (controller board with CPU, memory etc.) and software (firmware on the controller board).
The software is based on NetBSD Operating System.

[Debs1964]

Same here, but my guess would Intelligent Machine (or Model). Maybe Debs might know.

Intelligent multifunction device