The Improbable Origins of Powerpoint

In this article from IEEE Spectrum are the details behind the development of one of the most ubiquitous pieces of modern business software. Giving an idea of the time - it was originally envisined not only for video screens and projectors, but for 35mm slides and transparencies. I for one am happy the Microsoft Office suite no longer costs $1000!

https://spectrum.ieee.org/tech-history/cyberspace/the-improbable-origins-of-powerpoint