Clearly there was something extraordinary about Word for Windows. Part of its success was due to Microsoft’s marketing acumen. But it was also a stunning technical achievement, and its ability to run on ordinary PCs created the first popular vanguard of the new graphics-oriented style of document preparation.
Remember, this was a time when a typical personal computer might have an 8 Mhz processor, 1 megabyte of memory, a 20 megabyte hard disk, and a floppy disk drive. How did Word accomplish so much with so little?
There’s only one way to understand the magic in detail: read the code. With the permission of Microsoft Corporation, the Computer History Museum is pleased to make available, for non-commercial use, the source code of Word for Windows version 1.1a as it was on January 10, 1991.
Quite amazing that we’re getting access to the source code for pivotal software like this.