Maintec provides tool based and manual re-engineering of existing software, which involves knowledge mining and extraction of business rules. The re-engineering can be combined with migration from one hardware platform and technology to another. For example, we can migrate from an IBM Mainframe to Client Server, UNISYS based applications to IBM Mainframe, UNISYS based applications to Client Server, Web enabling of existing IBM Mainframe applications and AS/400 platform to Client Server. We can also convert non-GUI applications to GUI based applications, as well as two-tier architecture to three-tier architecture.