This is a list of notable software for version control. Local data model In the local-only approach, all developers must use the same file system. Open source Revision Control System (RCS) – stores the latest version and backward deltas for fastest access to the trunk tip compared to SCCS and an improved user interface, at the cost of slow branch tip access and missing support for included/excluded deltas. Source Code Control System (SCCS) – part of UNIX; based on interleaved deltas, can construct versions as arbitrary sets of revisions. Extracting an arbitrary version takes essentially the same time and is thus more useful in environments that rely heavily on branching and merging with multiple "current" and identical versions. Client-server model In the client-server model, developers use a shared single repository. Open source Concurrent Versions System (CVS) – originally built on RCS, licensed under the GPL. CVSNT – cross-platform port of CVS that allows case insensitive file names among other changes OpenCVS – unreleased CVS clone under the BSD license, with emphasis put on security and source code correctness Subversion (SVN) – versioning control system inspired by CVS Vesta – build system with a versioning file system and support for distributed repositories Proprietary AccuRev – source configuration management tool with integrated issue tracking based on "Streams" that efficiently manages parallel and global development; replication server is also available. Now owned by Micro Focus. Autodesk Vault – Version control tool specifically designed for Autodesk applications managing the complex relationships between design files such as AutoCAD and Autodesk Inventor. CADES - Designer productivity and version control system by International Computers Limited. Dimensions CM - software change and configuration management system developed by Micro Focus, formerly Serena Software, that includes revision control. Helix Core, formerly Perforce Helix - for large scale development environments IBM Configuration Management Version Control (CMVC) – version control system, no longer available. IBM Rational ClearCase – MSSCCI compliant (Source Control Plug-in API) configuration management system by IBM Rational Software IBM Rational Synergy – MSSCCI compliant (Source Control Plug-in API) integrated change management and task-based configuration management system, proprietary of IBM. IBM Rational Team Concert – Collaboration and application lifecycle management platform by IBM Rational Software IC Manage Global Design Platform (GDP) – design data management for IC design and Perforce infrastructure support. Panvalet - Around since the 1970s, source and object control for IBM mainframe computers. PTC Integrity (Formerly MKS