If one examines the dimensions of a CD-ROM jewel box, one can determine the approximate volume as being about seven cubic inches (1/4 5.5 x 5.5). A CD-ROM holds about 700 megabytes of data...or about 100 megabytes per cubic inch. There are 1728 cubic inches per cubic foot. If you take a minivan with a 22 cubic foot cargo space and load it with CD-ROMs, you have a 38,016 x 10 to the 8th byte capacity. Since each byte contains eight bits, you have a 30,412,800 megaBIT capacity. IF (and you can't) you could use all 1.5 megabit capacity of a T1 line to transmit data, it would take 20,275,200 seconds to transmit that data. Since there are 3600 seconds in an hour, that's 5,632 hours. With 24 hours in a day, it would take 234.7 days to transmit that data from Las Vegas to San Diego. The minivan can get that data there in five hours. Even from Las Vegas to New York City, it would only take three or four days with layovers for steaks and brewskies. The lesson is: never underestimate the bandwidth of a minivan loaded with CD-ROMs, diskettes, or tape. rhatch@ucssun1.sdsu.edu
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