There's a fine tradition of this, especially at early Microsoft. It's documented here: https://www.pagetable.com/?p=43 https://www.pagetable.com/?p=43 , and inc

There's a fine tradition of this, especially at early Microsoft. It's documented here: https://www.pagetable.com/?p=43 https://www.pagetable.com/?p=43 , and includes hidden messages that Gates allegedly added himself to prove that code the company licensed could still be traced back to him. (I hit the Ric Weiland one mentioned on my first computer, the Ohio Superboard II - https://www.pagetable.com/?p=43#:~:text=the%201977/1978-,Ohio%20Superboard,-II%20Model%20500 https://www.pagetable.com/?p=43#:~:text=the%201977/1978-,Ohi... ). This was all in the era of Gates' Open Letter to Hobbyists[1], when "Micro-Soft" was licensing their code to companies, perhaps because direct sales to hobbyists didn't work out. [1] https://en.wikipedia.org/wiki/An_Open_Letter_to_Hobbyists https://en.wikipedia.org/wiki/An_Open_Letter_to_Hobbyists