Even as he grows older, Microsoft founder Bill Gates still fondly remembers the catalytic computer code he wrote 50 years ago that opened up a new frontier in technology.

On Wednesday, the Microsoft co-founder posted on his Gates Notes blog, reminiscing about the company's early days for its 50th anniversary this year. Gates has certainly written plenty of code over those five decades, but he called this "the coolest code I've ever written" and shared a photo of himself holding a huge pile of paper showing the code.

The coolest code I’ve ever written.” With these words, Bill Gates introduces a blog post that celebrates Microsoft’s 50th anniversary by looking back on how the company got started. At the bottom of the that blog post,