PKARC.COM is compression software from the 1980s, and
PKXARC.COM is decompression software from the 1980s.

BACKUP.001 contains YBM.RAW
fails CRC check  on uncompressing,
but appears to be the same YBM.RAW as in
/homes/data/byms/1980
both files have 2241 records

Jean Roth jroth@nber.org 2007-05-30