Hi Kaoru,
For Enterprise installations (where it is installed on the client's
servers), here are the requirements:
Server Platform: Windows 2003 Server
Database: Microsoft SQL Server 2005 (soon we will be supporting 2008)
Client Browsers: IE 7, IE 8, Firefox, Google Chrome, Safari
For SaaS installations, we host it so there is not hardware or
software needed, just a web brower. Thanks!
Steve