5202185 story US Postal Service Moves To GNU/Linux 477 Posted by kdawson on Tuesday July 14, 2009 @06:44PM from the cobol-package-management dept. twitter writes "The US Postal Service has moved its Cobol package tracking software to HP machines running GNU/Linux. 1,300 servers handle 40 million transactions a day and cost less than the last system, which was based on a Sun Solaris environment." The migration took a year. The USPS isn't spelling how big the savings are, except that they are "significant."