This file describes the other files in the 02issue03
directory.  

In the computer.column directory at this site, I 
have now placed a cumulative index of all the
Computer Column program code at this site, keyed by the
issue in which it appeared.  This index file,
compcol.txt, has been updated and the new version
is also in the 02issu03.zip file mentioned below.

The file periodic.bas contains the code from the
May/Jun 2002 Computer Column.  For each period, it
displays two ICs, one calculated for a normal
polyalphabetic block and one calculated for a
Nicodemus block.  See the Column text in The Cryptogram
for an explanation of the program's theory and use.

The file lrbion.bas contains BION's program for
calculating the LR statistic to help decide whether
an unknown cipher is fractionated morse.  He has given
permission for his program to be included here.  See
his article in The Cryptogram, May/Jun 2002.

The file 02issu03.zip contains the files in this
directory.  It also contains the index of Computer
Column files at this site, indexed by the year in
which they appeared.  The .zip was created under MS-DOS
and its files are in DOS ascii text format.

A note for users:  Except for the .zip file, the other  
files in this directory are in Unix text format, which is  
different from MsDos format.  Users of Windows/Dos are  
advised to download the .zip file and extract its   
contents using WinZip or some other unzip utility.  

If you download the text files directly, you will find
that .bas basic programs work within QBasic and its
editor, but the files may not display correctly in other
editors (for example, Notepad).  If you download the text
files directly, you can avoid problems by converting them
to DOS format.  The program Unix2Dos was published in the
ND00 column and can be downloaded.  It was intended for use
with word lists, but it will convert other text files to
DOS format, too.