annual change traffic

from The Free On-line Dictionary of Computing (8 July 2008)
Annual Change Traffic

   <software> (ACT) The fraction of the software product's
   {source code} which changes during a year, either through
   addition or modification.  The ACT can be used to determine
   the product size in order to estimate software maintenance
   effort.

   (1996-05-29)
    

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