A general description of the treatment of the Bevatron injection problem is presented, and the programs are described. The program INJECT for the acceptance calculation determines what beam can be accepted into the machine as a coasting beam. The rf trapping calculation, PHASE, tells what beam will be accepted as the rf voltage is turned on. The accepted pulse calculation, HINJ, uses the results of the two previous calculations to determine what fraction of an injected pulse survives the injection, rf trapping process. The appendices contain sample control card checks, input data cases, and selected program output. (WHK)