Five Most Wanted

HP 2000ASR-33APF Imagination MachineHeathkit H11Enterprise 64

Welcome to The Trailing Edge

This site is devoted to computing technology which has been left behind by the rapidly advancing Leading Edge of computing. Many interesting and useful systems have been forgotten with the mad rush to stay on the Cutting Edge and maintain the high sales of hardware and software companies. While we too like to have the latest and greatest, we don't want people to forget the legacy which lead to today's systems. Many of these older systems were once considered part of the Bleeding Edge but most people know little if anything about them or just dismiss them. If you have some item related to these old systems that you'd like to clear out or just want to say hello and share some story about them, you can email me at

If you are looking for the used PC store in Canada, this is not it. What you are looking for is here.

Recent News

2020-07-26New Docs
Added the MTU-130 Double Density Disk Controller Manual to the MTU-130 section of the resources center and the Apple III Owner's Guide and Apple III Profile Owner's Manual to the Apple III section of the Apple library.

2020-07-19Various updates
Been a while but I'm in the process of re-writing a bunch of the site code and moving the collection. For now I've recently added some new docs to the Apple //, Atari 8-Bit and TI-99/4A library section. Also added an "Old Friends" section for systems that are no longer a part of the collection.

2018-10-15Microsoft co-founder Paul Allen dies
We've lost another one, Paul Allen, co-founder of Microsoft has passed away today of cancer at the age of 65.

2014-10-05MTU-130 Scans
Added a scan of the MTU-130 Hardware Manual in a new MTU-130 section of the Resource section of the site.

2014-06-01General News and Updates
Acquired a few new systems but as the server was moving physical locations and was down for a while, they haven't been added in yet. Should be able to update things more often as it is in a better location for me to work with now. Been far to long.

Site Copyright © 1997 - 2020 David Williams