Describes the system that has been developed to support the audit, analysis, and archiving of data for the Housing Assistance Supply Experiment (HASE). HAASP consists of a set of standards and naming conventions, plus standard data management utility programs. The files in the data base are stored in standard file format, each with an associated machine-readable dictionary. The data come mainly from annual surveys that were conducted in each of the two HASE sites, and are augmented by information from the housing allowance office in each site, which administers the HUD-sponsored experimental housing allowance program locally. The Note describes the inputs, outputs, and processing steps of each HAASP program, and includes a glossary of terms related to the HASE data systems.