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Tracking packages with stationary bar code reader in a warehouse sorting operation. Package tracking or package logging is the process of localizing shipping containers, mail and parcel post at different points of time during sorting, warehousing, and package delivery to verify their provenance and to predict and aid delivery.
The Postmaster General has stated that the system is primarily used for mail sorting, [2] though it also enables the USPS to retroactively track mail correspondence at the request of law enforcement. [2] It was created in the aftermath of the 2001 anthrax attacks that killed five people, including two postal workers.
It is a unique ID number or code assigned to a package or parcel. The tracking number is typically printed on the shipping label as a bar code that can be scanned by anyone with a bar code reader or smartphone. In the United States, some of the carriers using tracking numbers include UPS, [1] FedEx, [2] and the United States Postal Service. [3]
An Intelligent Mail barcode has also been referred to as a One Code Solution and a 4-State Customer Barcode, abbreviated 4CB, 4-CB or USPS4CB. The complete specification can be found in USPS Document USPS-B-3200. [2] It effectively incorporates the routing ZIP Code and tracking information included in previously used postal barcode standards.
Matter organizes into various phases or states of matter depending on its constituents and external factors like pressure and temperature. Except at extreme temperatures and pressures, atoms form the three classical states of matter: solid , liquid and gas .
The full eagle logo, used in various versions from 1970 to 1993. The United States Postal Service (USPS), also known as the Post Office, U.S. Mail, or simply the Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the United States, its insular areas and associated states.
Forms of matter that are not composed of molecules and are organized by different forces can also be considered different states of matter. Superfluids (like Fermionic condensate) and the quark–gluon plasma are examples. In a chemical equation, the state of matter of the chemicals may be shown as (s) for solid, (l) for liquid, and (g) for gas.
Some mailpieces (e.g., catalogues, magazines, larger envelopes) are not imaged by USPS automated equipment and do not appear in Informed Delivery notifications. Users can also receive USPS Tracking updates for incoming packages, provide delivery instructions, manage notifications, and schedule redelivery directly from Informed Delivery.