Published source code for Photoshop 1.0



    Open source published source code for Photoshop 1.0.1 .

    The code was published by the Museum of Computer History with permission of Adobe and is freely available for non-commercial use. The archive contains 179 files, a total of about 128,000 lines of code with almost no comments. About 75% are written in the Pascal programming language, another 15% are in assembly language for the Motorola 68000.


    Brothers Thomas Noll (left) and John Noll (right)

    When Thomas Knoll, a student in computer vision, wrote the Display program for editing digital images on a Macintosh in 1987, he never imagined it could be sold. Thomas made a program for his own needs. However, in 1988, he and his brother decided to make some money: the program was renamed to Photoshop, and 200 copies of Photoshop 0.87 were sold with the Barneyscan XP slide scanner.

    A promising program was noticed by Adobe employees - and they managed to agree with the brothers on licensing and the right to distribute Photoshop 1.0, which was ready in April 1989 and went on sale in early 1990.



    Thomas Noll wrote the first version alone, then he was given an assistant, they wrote Photoshop 2.0 together with a colleague. Brother John made many plugins.

    1990 Sample User Guide 1990 Sample
    Tutorial
    Source Mirror on Github

    Screenshots of the first versions of Photoshop














    For comparison, the interface of the standard graphics editor MacPaint, which came with the Macintosh computer.


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