Sun's re-hosting business, part of its Mainframe Migration offerings, was set up to help customers move their mainframe applications over to Sun's Unix-based hardware.

To date, the group has done more than 1,200 re-hosting implementations, according to Sun's Web site.Sun had written two major mainframe programs to run on its Solaris version of Unix, both of which have now been acquired by Clerity, the company said.

These two programs are the called Mainframe Transaction Processing (MTP) and Mainframe Batch Manager (MBM).