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, IV-IV and III-V 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 today´s scientists and to offer a complete overview on semiconductor data, volume III/41 provides all data available so far. They will be published in the following  way: a series of eight subvolumes cover only the supplementary data to vols.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 numerical data, figures and references. Easy access to the documents is provided via substance and property keywords, listing and full text retrieval.