The executable programs in this directory were created on a Sun Sparcstation
running SunOS 4.1.3.  The code is fairly generic and should compile on a
variety of UNIX machines.

Programs and files:

	callbook.db - The FCC Callsign Database

	call - A unix-style command line program which looks up callsigns
		or names

	nucall - A login-style callbook server program.

	mknlist - creates an unsorted index of all the lastname,firstname
		combinations in the database.  The database is first
		created using mknlist, and then 'nsort' is run to sort
		the data.  This is only done once.

	nsort - sorts the names index created by mknlist (see above)

	pick - a test program used to select every n'th callsign in the
		database.  During testing, the list created by 'pick'
		was fed to the 'call' program to test its accuracy.

	cblib.a - a library of data manipulation functions used by
		both 'call' and 'nucall'

	welcome.cbk - a text file which displayed by nucall at signon.

	call.log - a logon record of all who use 'nucall'


Programming Notes:

This software was written and compiled under both SunOS 4.1.3 and under
Solaris 2.3.  The executables in this directory were compiled under
SunOS 4.under SunOS 4.1.3 making them compatible with either OS.

These programs make use of the mmap() system call, which is available
under most systems using BSD4.3 versions of UNIX.  For those systems
not supporting the mmap system call, the user will have to create a
workaround.  This workaround typically involves using the fseek()
system call.