The Computer History Museum in California lwa has, with the permission of Adobe, the source code of the 1990 omnibus Photoshop 1.0.1 was put online. The code is almost complete and can be downloaded for free for personal use.
The source code of the photo editing program is for three-quarters of Pascal-code and 15 per cent from assembler language for the Motorola 68000 processor. This cpu was used in the Apple Lisa and the first Apple Macintosh, the computers that have Photoshop in the first instance was developed. The exhibit is not quite complete; the MacApp-application library in Photoshop 1.0 is used, is the property of Apple, that, apparently, no permission to publication is given. The rest of the source code is for personal use, download.
Photoshop was in 1987 created by Thomas Knoll, a student at the university of Michigan. Thomas developed the program together with his brother John, in the first instance for their own use, and named it Display. In 1988, the brothers that the program may be commercially interesting, and then they went in search of a distributor. The quest ended up at the in 1982 founded Adobe Systems, the product is finally in 1990 put on the market. Photoshop grew into one of the most used photo editing tools.
The Computer History Museum in Mountain View, California, has as its purpose the history of computing at the show. The museum offers offline as well as online exhibitions. 