	DLA - Date of last access.  This program implements the often requested
 date of last access feature for VMS, using the expiration date field in the
 file header.  To use DLA, you must first enable expiration dates on your
 disks thusly;

		SET VOLUME/RETENTION=(9998-,9999-) DUA0:

	This command will cause VMS to update the expiration date of files
 which are accessed (read or write).  The difference of 1 between 9998 and
 9999 causes VMS to update the field only the first time it is accessed in
 a 24 hour period (to reduce overhead on frequently accessed files).  In case
 you were worried about files expiring, 9999 days is about 27.4 years... I
 myself believe that VAXen will be history by then anyway (except government).

	DLA opens each file in the wildcard expression, and calculates date
 of last access and number of days since last access.  DLA reports filename,
 allocated size, date of last access, days since last access and owner.

	NOTE: Due to the fact that the expiration date has a granularity of
 minutes, and DLA only deals in whole days, you may see files that were last
 accessed on the same date, but have a different number of days since last
 access.

	NOTE: Until the first time a file is accessed after the
 "SET VOLUME/RETENTION" command is issued, the file has zeroes in the EDT
 field.  For those files, DLA displays "<<Genesis>>".  DLA displays
 "<<File locked>>" or "<<Open error>>" if it is unable to open the file.  It
 displays "<<No info>>" if date translation fails.  If strange dates of
 last access appear, it could be caused by files which were copied from
 a foreign system that actually uses file expiration for it's original
 purpose (ZOUNDS!).  To fix both of these problems, it is suggested that you
 "touch" all of the files on a disk immediately after doing the
 "SET VOLUME/RETENTION" by using the GROPE program.

	To build DLA, see the BUILD.COM command procedure.  To invoke DLA, first
 define a symbol;

		DLA :==$SYS$LOGIN:DLA

 assuming that DLA.EXE resides in your home directory.  Then issue commands
 thusly;

		DLA			! Look at files in current directory
		DLA [...]		! Look at files in subsequent subdirs
		DLA dua0:[*...]*.c	! Look at all .c files on DUA0:
		DLA/AGE=90		! Look at all files 90 days or older

	The /AGE option may appear anywhere on the command line.  Default
 wildcarding is *.*;*.  Note that <Genesis> files will always be displayed,
 since DLA has no way to determine their age.
