Photoshop 1.0 source code now a museum artifact
(Credit: Computer History Museum)
The museum published the software yesterday, following up on its earlier release of the source code underlying Apple’s original MacPaint.
Source code is what humans write — in Photoshop 1.0′s case the brothers Thomas and John Knoll. The initial Photoshop is written in written 128,000 lines of code, a combination of the high-level Pascal programming language and low-level assembly-language instructions. When converted to machine code, the program was small enough to fit on a floppy disk.