Glad you asked.. here they are:

• Linux/Unix (Red Hat, Debian, FreeBSD, Mandrake, etc.) or Windows OS, Apache Web Server

• Ability to run executable files (necessary for ffmpeg.exe)

• root SSH access (necessary for RMS installation)

• PHP 4.3.6 and higher (safe_mode must be Off, exec() must be allowed and allow_url_fopen also must be On) with mbstring, domxml and xsl extensions (they are required to run Orca forum and support UTF-8)

• MySQL 4.1.2 and higher

• GD library compiled with TrueType fonts (for photo processing) or ImageMagick as an alternative

• Sendmail or Postfix

• shell or another interface for setting Cron Jobs

• 20MB of disk space and 1MB of MySQL DB space for installation

• 8MB of disk space and 50KB of MySQL DB space for an average user