If you have $20 to spare, Edward Hamilton Booksellers <http:// www.hamiltonbook.com> has an interesting volume: item 612139X, Classic Operating Sytems: From Batch Processing to Distribute Systems. You can read a more complete description at <http:// www.springer.com/west/home/generic/search/results? SGWID=4-40109-22-2182421-0> (listed at $74.95). CRC