1
Adobe Photoshop Source Code (2013)
When brothers Thomas and John Knoll began designing and writing an image editing program in the late 1980s, they could not have imagined that they would be adding a word to the dictionary.
Computer History Museum Blog
Explore the technology, people, and ideas that have shaped our digital world. At the Computer History Museum in the heart of Silicon Valley, discover world-class exhibits, iconic artifacts, and the stories of the pioneers, innovators, and creators behind the technologies we use every day. See how computing has…
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Visit computerhistory.org → RSS feedOn Hacker News Oct 2014 – Jun 2026
History & Retro Computing 28Software Engineering 18Tech Industry & Business 4Life, Learning & Writing 2Tools & Productivity 1Systems & Performance 1
2
Adobe Photoshop 1.0.1 Source Code (2013)
When brothers Thomas and John Knoll began designing and writing an image editing program in the late 1980s, they could not have imagined that they would be adding a word to the dictionary.
3
Lisa Source Code Release
CHM publicly releases the source code to Apple's Lisa computer, including its system and applications software.
4
Discovering Dennis Ritchie’s Lost Dissertation
Until recently, across a half-century perhaps fewer than a dozen people had ever had the opportunity to read Dennis Ritchie’s dissertation—the intellectual and biographical fork-in-the-road separating an academic career in computer science from the one at Bell Labs leading to C and Unix. Why?
5
Microsoft Word for Windows Version 1.1a Source Code (2014)
The dominant word processing program for personal computers in the 1980s was DOS-based WordPerfect. Microsoft Word for DOS, which had been released in 1983, was an also-ran.
6
Apple II DOS source code
Unlike the Apple I, the Apple II was fully assembled and ready to use with any display monitor. The version with 4K of memory cost $1298. It had color, graphics, sound, expansion slots, game paddles, and a built-in BASIC programming language.
7
The Smalltalk Zoo
In commemoration of the 40th anniversary of the release of Smalltalk-80, the Computer History Museum is proud to announce a collaboration with Dan Ingalls to preserve and host the “Smalltalk Zoo.”
8
The Deep History of Your Apps: Steve Jobs, NeXTSTEP, and Early OO Programming
Since 2008, over a hundred billion apps have been downloaded from Apple’s App Store onto users’ iPhones or iPads. However, the technology and tools powering the mobile “app revolution” are not themselves new, but rather have a long history spanning over thirty years, one which connects back to the beginnings of…
9
The Earliest Unix Code: An Anniversary Source Code Release
In celebration of Unix’s 50th anniversary, the CHM Software History Center is delighted to make publicly accessible for the first time some of the earliest source code produced in the Unix story.
10
The Eudora Email Client Source Code
Electronic mail is one of “killer apps” of networked computing. The ability to quickly send and receive messages without having to be online at the same time created a new form of human communication. By now billions of people have used email.
11
Xerox Alto Source Code (2014)
Depending on your age, your first computer might have been an Apple II, a Radio Shack TRS-80, an IBM PC, an Apple Macintosh, or another of the early personal computers. If you missed these early machines the first time around, perhaps you have seen them in the Personal Computer section of the Revolution exhibit at the…
12
Steve Jobs, NeXTSTEP, and early object-oriented programming (2016)
Since 2008, over a hundred billion apps have been downloaded from Apple’s App Store onto users’ iPhones or iPads. However, the technology and tools powering the mobile “app revolution” are not themselves new, but rather have a long history spanning over thirty years, one which connects back to the beginnings of…
13
The APL Source Code (2012)
Thousands of programming languages were invented in the first 50 years of the age of computing. Many of them were similar, and many followed a traditional, evolutionary path from their predecessors. What eventually became APL was first a mathematical notation, not as a computer programming language.
14
Xerox Alto Source Code
Depending on your age, your first computer might have been an Apple II, a Radio Shack TRS-80, an IBM PC, an Apple Macintosh, or another of the early personal computers. If you missed these early machines the first time around, perhaps you have seen them in the Personal Computer section of the Revolution exhibit at the…
15
The Remarkable Ivan Sutherland
CHM releases to the public for the first time a full oral history with Ivan Sutherland, pioneer of computer graphics, virtual reality, asynchronous systems, and more.
16
In His Own Words: Gary Kildall
Gary Kildall was a pioneer of personal computer software. He wrote programming language tools, including assemblers (Intel 4004), interpreters (BASIC), and compilers (PL/M). He created a widely-used disk operating system (CP/M). He and his wife, Dorothy McEwen, started a successful company called Digital Research to…
17
MacPaint and QuickDraw 1984 source code (2010)
The Apple Macintosh combined brilliant design in hardware and in software. The drawing program MacPaint, which was released with the computer in January of 1984, was an example of that brilliance both in what it did, and in how it was implemented.
18
MacPaint and QuickDraw Source Code (2010)
The Apple Macintosh combined brilliant design in hardware and in software. The drawing program MacPaint, which was released with the computer in January of 1984, was an example of that brilliance both in what it did, and in how it was implemented.