GNU Pem is a personal expenses manager. Pem helps you to keep track
of personal income and expenses in an extremely elegant style.
On GNU/Linux like systems, Pem works by storing the details in
a CSV file, placed in the ~/.pem directory under your $HOME
directory; On Windows, the same file is placed in pem directory,
under the USERPROFILE directory. Each such file is named after
the current month, and is automatically created by Pem when you
enter the first record for the month. It is not advisable to
edit these files by hand.