Fischer assays of oil-shale drill cores and rotary cuttings from the Piceance Creek Basin, Colorado / by John R. Dyni ; U.S. Department of the Interior, U.S. Geological Survey in cooperation with the U.S. Department of Energy. (OCLC #40686692)

The Computer Files workform (Type: m) is not always appropriate for CD-ROMs, but in this case it is! The contents are primarily numerical data, with a few text files of very nice metadata explaining the contents of the various rows and columns.

The record includes a 256 for Computer File Characteristics:

    256 __ ǂa Electronic numeric data.