From the publisher:
"Welcome to The Zocalo, the equipment book for the Babylon 5 Roleplaying Game. Within, you will find a pleathora of gadgets and gizmos, ranging from the ridiculous to the sublime. Some of this equipment appeared in other Babylon 5 books. Most debut here, although a careful viewer will recognize them, or at least their implied presence, from the show. This book will also lay out the cost for various services, ranging from the fees for maintaining a potted plant in your room to renting a starcruiser or putting on a fireworks display.
"In addition, The Zocalo examines the technical achievements and gewgaws of over two dozen alien races, from the Abbai to the Vree. Each of these races, for good or ill, takes part in the galactic trade that feeds the economy of a thousand worlds. Of course, all races have things they simply do not trade. This 'secret' technology typically forms the core of a race's military or mercantile might."