Introduction

PCGen has some requirements in order for you to run it:

All versions of PCGen need Sun's Java Runtime Environment (JRE) which is available for all common OS's, including Windows, Mac OS, UNIX and Linux.
PCGen 5.10.2 (and above) needs to run under Sun's JRE (Java) 1.5.x (or above).
If you wish to view PDF output sheets, you'll need a PDF viewer.
Minimum RAM is 256MB (recommended 1-2GB)
Minimum CPU is 1GHz (recommended 2Ghz+)
200MB of free HD space

PCGen Requirements