Contains sections on reliability estimations for circuits with / without redundancy, parts count and parts stress analysis, reliability unit conversion factors, definitions of meantime to failure and meantime between failure, schedules of failure rates for nine classes of integrated circuits, three classes of discrete semiconductor components, five classes of capacitors, five classes of resistors, three classes of electromechanical devices, two classes of wound components, five classes of optical components, two classes of resonators, two classes of surge protectors and hybrid circuits. HRD 5 also contains eight tables of modifying factors including temperature, package, quality, climatic and environment. HRD 5 is published by ILI on behalf of BT.