“Computer Pioneers” is a great historical docu-film (recorded in 1996) about the origins of computer technology that you can watch on YouTube.
Computer pioneer Gordon Bell hosts this two-part program on the evolution of electronic computing from its pre-World War II origins through the development of the first commercial computers. His narration traces the development of the stored program computer architecture which remains the foundation of todays modern computers.
The Dawn of Electronic Computing
If you want more, there’s another interesting documentary.
“The Computers”, that I found really inspirational and that breaks some stereotypes about women in technology careers.
