[ Thanks to Kyle
Trnka for this link. ]
“The move has taken the better part of a year since all
the original system code was written in Cobol and had to be
converted for Linux — a less expensive option than rewriting it
altogether.“The migration is a part of a larger plan to standardize on open
source software to lower operating costs and increase the number of
transactions the system can handle. The USPS currently manages over
40 million transactions every day, from tracking priority mail to
shipping packages for customers at local post offices.”