Carnarvon analyses how old the software system is on a per-line basis and
extracts figures and indexes that make it possible to identify how `old' the
software is, how much it has been maintained and how much effort it may suppose
to maintain it in the future.
A lot of software, mostly open source software, is developed using version
control tools from which it is possible to extract even when a single line of
code was edited for the last time. To collect all this kind of data and analyze
it statistically could show information in terms of software aging ...