Download version 1.0 of Adobe Photoshop
The term 'Photoshopped' is now almost part of our modern vocabulary, but the legendary imaging software has certainly come a long way over the years. So if you're a loyal Photoshop user, or just a complete geek, then you owe it to yourself to grab the source code of Adobe Photoshop 1.0, which was made available today.
Just over 128,000 lines code made up the original application, mixing both Pascal and assembler language to create a simple yet robust editing software. Initially designed by Photoshop co-founder Thomas Knoll, he later took on a second engineer to help with the coding. Photoshop was first called Display, and started out mainly as a personal product, but after Knoll's brother saw commercial viability in the product, he renamed it to Photoshop and sold it to Adobe in 1989, with a Mac-exclusive version being released in 1990. Over the next ten years, 3 million copies of the program were sold.
You can download the original source code and the 1990 instructional manuals over at the Computer History Museum.