A recent Tweet by @ben got me thinking, there many people out there that have made massive contributions to code and computers in general. Without these people It nearly wouldn't be the same as it would be today.
Such as Grace Hopper:
Often referred to as the first women in software she designed and created the first compiler in her spare time. Additionally she was one of the first programmers to start working on the Harvard Mark I. She has done a lot in the computer science world, everything from being an Navy rear admiral, creating the compiler to creating COBOL one of the first high level programming languages ever made.
Does this man need an introduction? The reason why we're all tweeting away, facebooking and able to interact with millions of people over a computer is because this man invented the world wide web.
There are many more people that have made contributions to the technology today. Who do you think has made a significant impact for development, and tech?