From the introduction:
CYD20 provides the necessary background information for a cyberpunk campaign using the d20 system (a trademark of Wizards of the Coast, Inc). CYD20 doesn’t present a complete cyberpunk setting. Rather, it contains all the necessary information for you to stage your own cyberpunk campaigns. Whether you like to play the Neuromancer or Blade Runner, CYD20 will provide you with all the necessary rules and statistics.
From assault rifles to miniguns, combat software to the newest advancements in microprocessor technology, from nerve gas to botulin, cybernetic implants to genetic modifications, from hovercrafts to VTOL aircrafts and ballistic clothing to powered battle armor, CYD20 contains almost everything you’re going to need in your cyberpunk campaign.