%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% This file documents look and use of
% the barcodes this package belongs to.
% It may be freely used without any 
% further permission.
% You should have received this file as part of
% the barcode package.
%
% Author: Peter Willadt
% Date: 1997-11-29
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Note:
% 1. This file has already been run through codean.pl
%
% 2. You need to have the fonts installed, of course.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Fonts
%
\font\xlix=wlc39 scaled 2000
\font\itf=wlitf  scaled 2000
\font\cdb=wlcdb  scaled 2000
\font\eanfont=WLEAN scaled 1200
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Inputs
%
\input code39.tex
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Def's
%
\def\ean#1{\message{Call codean.pl}}
\def\eean#1{\message{Call codean.pl}}
\def\isbn#1{\message{Call codean.pl}}
\def\embed#1{}
\def\EAN#1{\vbox{\hsize=0.4\hsize\vskip10pt\eanfont#1\vskip10pt}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Here we go
\parindent0pt
Hello, this is a test sheet of the barcode fonts.

At first, we deal with code 39. Code 39 is represented in this package
both in form of a native font (Metafont-source) and in form of
\TeX{}-macros. code 39 features low-density alphanumeric encoding.

Here you may see how HELLO looks like in code 39 (the start and stop
sign is mapped to @, if you're curious, so in the source to this sheet
I have written {\tt@HELLO@} after having selected the proper
font). This first example uses the font.

{\xlix@HELLO@}

Another approach is to use \TeX{} macros to make up bars. Here is the
same HELLO with macros:

\begincodethirtynine{HELLO}\endcodethirtynine

Interleaved two-of-five (ITF for short) features high-density
numerical-only encoding. Your code has to have an even number of
digits. The start sign is mapped to $+$, the end sign to $-$. 
So, to code 0123456789, you type {\tt+0123456789-}, and the result
looks like this:

{\itf+0123456789-}

If you still have not got enough of barcoding, here is codabar. Here
you got four sets of start/stop signs that get decoded together with
the numbers. The start/stop sign pairs are a/t, b/n, c/*, and d/e. So
{\tt a12345t} looks like this:\bigskip

{\cdb a12345t}

And, last and perhaps most important, the EAN font. Read {\tt
eandoc.tex} to find out how these are coded, here is just the output
of the example code mentioned there:
\embed{2500000000000}

\line{
\EAN{4 +AcFHaa-KKLKNK+} % or, without checksum: %(4025700001030)
\hfil
\EAN{4 +AcFHaa-KKLKNK+} %(402570000103)
}
\line{
\EAN{2 +FAaaAa-KKLMNT+} % embedded(123)
\hfil
\EAN{9 +HiaCaB-LNOOSN+} % ISBN(0201134489)
}

And that's all. Perhaps you may think that this is not a beautiful
document---but barcodes aren't beautiful. As long as reading devices
do not have \ae{}sthetic feelings, I don't regard this as a problem.
\bye