This digest was prepared by the Human Factors Standardization SubTAG of the Department of Defense Human Factors Engineering Technical Advisory Group (DoD HFE TAG). This booklet is a digest of material appearing in MIL-STD-1472, and is complemented with material from MIL-HDBK-759 and the Federal Aviation Administration (FAA) Human Factors Design Guide. The user is therefore referred to those documents and its references for required supplementary information. This digest provides basic, quantitative human engineering design data in pictorial, tabular, and graphical formats for use during system, equipment, or facility design and assessment. Its purpose is to furnish a convenient "portable" reference of human engineering design criteria and guidelines. The principles, explanations, limitations, and application techniques associated with the data have been intentionally omitted. This abbreviated presentation presupposes that the user is familiar with the bases and limitations of the given data or will consult applicable references to ensure appropriate application of the data.