KMP at 5:57am Saturday, November 10, 1979
Deleting "DSK:DATCHK;DATCHK 3".
Deleting "DSK:DATCHK;DATCHK 4".
Deleting "DSK:DATCHK;DATCHK 5".
Deleting "DSK:DATCHK;DATCHK 6".
Deleting "DSK:DATCHK;DATCHK 7".
Deleting "DSK:DATCHK;DATCHK NBIN".
Deleting "DSK:DATCHK;DATCHK OBIN".
Deleting "DSK:DATCHK;DATCHK OOBIN".
No reason given.

___022 at 9:29am Thursday, November 15, 1979
Deleting "DSK:DATCHK;DATCHK 10".
No reason given.

KMP at 6:33am Saturday, December 1, 1979
Deleting "DSK:DATCHK;DATCHK 11".
Because: New version (13) macrofied for nicer readability..

KMP at 3:48am Friday, December 21, 1979
Deleting "DSK:DATCHK;DATCHK 13".
No reason given.

KMP at 10:42pm Friday, May 9, 1980
Deleting "DSK:DATCHK;DATCHK 18".
Deleting "DSK:DATCHK;DATCHK 19".
Because: DATCHK 20 should have fixes for lack of date and for the original
fencepost that introduced.î