How a brilliant debugger (Scroll Screen Tracer by Murray Sargent) turned Windows OS into the IBM OS/2 crusher and gave Microsoft its killer product.
For those interested in trying it out, SST can run from within DOSBox, a DOS emulator.
Personal experience: Murray Sargent's SST was indeed a powerful interactive debugger around. During the transformation of BioSonics technologies from legacy Windows 98 into a Linux based real-time embedded systems platform, we used it to reverse-engineer the data handshaking protocol of the aging DT echosounder. We then used it to design the real-time embedded system design, while maintaining backwards compatibility, in order to launch the BioSonics DT-X sonar system. This has been the core of all BioSonics technology products for the past 15 years.
[1] Saving Windows from the IBM OS/2 Bulldozer
https://blogs.msdn.microsoft.com/murrays/2006/12/07/saving-windows-from-the-os2-bulldozer/
[2] A Wizard's Wizard - How David Weise exploded OS/2 and made Windows 3.0 into the OS killer.
https://blogs.msdn.microsoft.com/larryosterman/2005/02/02/farewell-to-one-of-the-great-ones/
[3] Windows 3.0
http://gunkies.org/wiki/Windows_3.0
[3] BioSonics Sonar Technology systems
http://www.biosonicsinc.com/products/
[4] Other footnotes
http://www.math.columbia.edu/~woit/wordpress/archives/000149.html
http://www.math.columbia.edu/~woit/wordpress/archives/000070.html
https://www.edge.org/memberbio/nathan_myhrvold