Typically, the program of study is a university document submitted as part of the documentation for graduation. It outlines the specific courses that applied toward the doctoral degree. The reason we request this document is to ensure that we evaluate only courses that were a required part of the doctoral program (as opposed to a student who happened to take extra ABA classes at the time they were completing an unrelated doctoral degree). Such information is not recorded on transcripts but is usually quite apparent on the program of study.
Other documents that provide the same information can be reviewed in lieu of the program of study. For example, many universities outline the doctoral degree requirements in their course catalogs, departmental handbooks, orientation materials, websites, etc.