E8 was created by Bill Silver bsilver@tidewater.net. The first version was posted to the PiDP-8/I mailing list on 2020.04.05; it is tagged “v0” in the Fossil repository. The subsequent 8 versions were also posted to the mailing list and are tagged with their version numbers and posting timestamps.
Warren Young wyoung@tangentsoft.com converted these zip files to a Fossil repository and converted the PDF user manual to Markdown format on 2020.04.25, making some improvements to the manual along the way.
From v9 onward, development happened on the Fossil repository.