The Trybos Project User's Guide Version 1.2 Rob Kennedy This report describes the Trybos Project, which now consists of the Trybos and Banks software products, from the pedestrian Run II CDF programmer's point of view. Trybos is an Object-Oriented C$++$ package to read, write, and manipulate data in CDF YBOS format. Files read and written by Trybos are practically indistinguishable from files read and written by the CDF YBOS software package. Banks is a collection of bank classes which encapsulate the many bank data structures in use at CDF. Both Trybos and Banks are maintained in the cdfsoft2 CVS repository using SoftRelTools.