This episode features Enhancements to Graph It, originally released in 1982 by APX.  It was developed by Howard D. Siebenrock.  The main difference here is the ability to save and load the generated graphs. Podcast: Download Manual and Supplement Scans Scan of the manual cover: Ad from APX catalog Fall 1982:   Enhancements to Graph It in Action Before … More S2E11 APX Enhancements to Graph It – Supplement