What's in that USPS postage barcode? « Frederick's Timelog

A lot, apparently. Let's dive into 2D barcodes, high speed automation, printers, cryptographic signatures, postal mail and postage, and patents.

Intelligent Mail Barcode: What It Is and How to Read It

DMM 505 Return Services

USPS Intelligent Mail Barcodes

How to Check Your Clock Rings in Lite Blue: USPS Postal Employees

What happens when a bad bar code isn't covered up?: Modern U.S. Mail

DMM 505 Return Services

United States Postage Meter Stamp Catalog/Sub-group QC – Francotyp-Postalia - Wikibooks, open books for an open world

Usps Kiosk Stamps, There are no extra fees to use the USPS kiosks.

Software for tracking your postal mail and printing tracking barcodes

Barcode Gallery