Mercurial is a fast, lightweight Source Control Management system designed for efficient handling of very large distributed projects. . Its features include: * O(1) delta-compressed file storage and retrieval scheme * Complete cross-indexing of files and changesets for efficient exploration of project history * Robust SHA1-based integrity checking and append-only storage model * Decentralized development model with arbitrary merging between trees * High-speed HTTP-based network merge protocol * Easy-to-use command-line interface * Integrated stand-alone web interface * Small Python codebase . This package contains the architecture dependent files.