DataGlyphs/Microglyphs are a robust and unobtrusive method of embedding computer-readable data on surfaces using tiny 45-degree diagonal lines representing binary 0 or 1. The article details how data is encoded, data density compared to PDF417 barcodes, factors affecting density (resolution, error correction, data compression, overhead), and licensing information.
The article details a digital archive of source code and documents from Xerox PARC, spanning from the 1980s to 1994. It describes the archive's contents, organization, and the tools/languages/projects represented (Cedar/Mesa, Interlisp, Alto systems, graphics, printing, AI, etc.). It also explains how the files were processed for viewing (HTML, PDF, octal dumps) and provides information about file naming conventions and archive structure.
