Computer program version management system with reduced storage space and enabling multiple program versions to have the same name

摘要

A computer program version update system reduces storage space usage and enables calling programs to invoke any version of a program using the same name by storing only modified modules of a program for different program versions. Multiple versions of a program can thus have the same name. Any version of the program may be constructed from the modules upon command with a user issuing such a command and including a version number corresponding to the requested version as a parameter to invoke a program construction procedure.