Vols. III/17a-i and III/22a, b (supplement) on semiconductor physics and technology have been published earlier, the latter covering new data on the technologically important group IV elements and III-V, II-VI and I-VII compounds only. The wealth of further data from the last decade is now being critically evaluated by over 30 well-known experts in the field of semiconductors. To meet the demands of todays scientists and to offer a complete overview on semiconductor data all data available so far are published in the following way: a series of five subvolumes covers only the supplementary data to volumes III/17 and 22. Enclosed to each subvolume, a CD-ROM contains a complete, revised and update edition of all relevant data. For each individual substance the information is presented in userfriendly documents, containing data, figures and references. Easy access to the documents is provided via substance and property keywords, listings and full text retrieval.