Author: Michael

Thomas Knoll wasn’t trying to build the world’s most influential image editor. In 1987, the University of Michigan PhD student had a narrower headache. His Macintosh Plus displayed images in black and white only, no grayscale, which made his computer vision research far harder than it needed to be. So he wrote a small utility he called Display. It tricked the screen’s pixels into simulating shades of gray. That piece of student code, scratched out to solve a concrete problem, became the foundation of Adobe Photoshop. The software first hit store shelves on February 19, 1990. Over the next three…

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