KOSMO version of MI Grids?

[Bitnik]

Also @fredrik posted these resources once:

Fast prototyping

The patch and tweak folks have a bunch of symbols here: http://patchandtweak.com/symbols/. They’re designed to describe patches, not modules, but may provide some inspiration. In the book, they mention the following prior works: Liner notes for Nonesuch Guide to Electronic Music (Beaver and Krause, 1968) Electronic Music: Systems, Techniques, and Controls (Strange, 1972) Patch Notation: A Business Approach (Bugg, in Synapse March/April 1978 (PDF)) Serge Modular Music System manuals.

I particularly recommend the Patch and Tweak symbols, which are available as vector (SVG) files so they can be resized easily.