I highly recommend Secret history of Silicon Valley series by Steve Blank: https://steveblank.com/2009/03/23/if-i-told-you-i%e2%80%99d-have-to-kill-you-the-sto

I highly recommend Secret history of Silicon Valley series by Steve Blank: https://steveblank.com/2009/03/23/if-i-told-you-i%e2%80%99d-have-to-kill-you-the-story-behind-the-secret-history-of-silicon-valley/ https://steveblank.com/2009/03/23/if-i-told-you-i%e2%80%99d-... Steve has written in detail about how early signal intelligence came to be, how eventually they shaped the Silicon valley and modern tech. Other posts on Steve's blog are interesting too.