🚀 go-pugleaf

In article <997@kaos.MATH.UCLA.EDU>, dgc@euphemia.math.ucla.edu (David G. Cantor) writes:
> 
> The US Postal service gives a discount if the appropriate
> barcode for the zipcode is used.
> 
> Does anyone know the US Mail barcode standard?
> 
> dgc
> 
Yes--it's the 7-4-2-1-0 code.

Tall bars mark the beginning and end of the ZIP--discard them.

Next, mark off each group of five bars.  Notice that exactly 2 of the 5 are
tall in each case.  Take the sum of the digits corresponding to the values
above.  The sum is the ZIP digit, with the convention that 7+4=0 (neat,
huh?)

The last group of five bars is a checksum--it is the number that must be
added to the sum of the ZIP digits to yield a multiple of 10.


==>Michael Costello                   costello@world.std.com
==>BCS*Mac, The Boston Computer Society Macintosh User Group
==>P.O. Box 2591; Woburn, MA  01888             617-631-8188