iTop can be used by different types of profiles:
iTop relys on Apache/IIS, MySQL and PHP, so it can run on whatever operating system that supports these applications. It has been tested on Windows, Linux (Debian, Ubuntu and Redhat).
The application also runs on Solaris and MacOS X. Since iTop is a web based application you don’t need to deploy any client software on each user’s PC. A simple web browser is enough (IE 9+, FF 3.5+, Chrome or Safari 5+).
To find out what to do next in iTop, please read Getting started with iTop.