A version control library system tracks different versions of software components and files. Each entity in the library is assigned a unique identity with version number and timestamps. The library allows users to create and manage versions, add or delete components, and back up files. Version control systems like RCS treat all files as text and store only the differences between versions to save space. Effective configuration management integrates version control libraries with configuration databases and change control processes.

2.  A version control libraries may be part of a
configuration management database
 It’s may be used as a Stand alone tool
 A configuration control libraries controls the
various that constitute the various version of a
software product
 A version control library system is not a
database and does not contains the information
required to answer question such as those
posed above

3.  Entities in a control library system is not
database and does not code, job control
commands, data files, and supporting
documents..
 Each entity in the library must carry an
identity stamp that include a version number,
data,time and programmer identity
 operation to be performed on a library
include creation of the library ,addition and
deletion of components,preperation of back

4.  operation to be performed on a library
include creation of the library ,addition and
deletion of components,preperation of
backup, editing of files, listing of summary
statistics, and compilation/assembly of
specified version of the system(JOS78)
 The version control system (RCS)is one
example of a version control library
system(TIC82)

5.  RCS treats all files as text, even though they
may in fact contain programs, data and
documents.
 Using RCS different versions of text files can
be merged to create versions.
 Only the different between successive
version are stored to save the space
overhead of storing multiple version of file

6.  Effective configuration managements system
integrate support tools such as configuration
manage database and version control library
system with in the managerial framework of
change control described in the previous
section