Michael - most excellent as we have analog computers in the museums displays made by them!!! thanks Ed Sharpe - Archivist for SMECC  - Arizona  In a message dated 3/25/2023 3:37:46 PM US Mountain Standard Time, cctalk(a)classiccmp.org writes:  If anybody is interested in Systron-Donner Corporation, this booklet on “BlockProgramming For Physical Systems” was in a recent acquisition. Available at: https://archive.org/details/bpfps Michael.--   *Blog: RetroRetrospective – Fun today with yesterday's gear……..<http://www.jongleur.co.uk/blogs/>**Podcast*: *Retro Computing Roundtable <http://rcrpodcast.com/>* (Co-Host)