Serial numbers

An International Standard Serial Number (ISSN) is an eight-digit to uniquely identify a periodical publication (periodical), such as a magazine. The ISSN is especially helpful in distinguishing between serials with the same title. ISSNs are used in ordering, cataloging, interlibrary loans, and other practices in connection with serial literature.

An Internment Serial Number (ISN) is an identification number assigned to captives who come under control of the United States Department of Defense (DoD) during armed conflicts.

United Kingdom aircraft registration is a register and means of identification for British owned and operated commercial and private aircraft, they are identified by registration letters starting with the prefix G-.

United Kingdom military aircraft registration number, known as its serial number, or tail code is a specific aircraft registration scheme used to identify individual military aircraft belonging to the United Kingdom (UK). All UK military aircraft display a unique serial number, allocated from a unified registration number system, maintained by the Air Section of the Ministry of Defence (MoD Air). The same unified registration system is used for aircraft operated by the Royal Air Force (RAF), Fleet Air Arm (FAA), and Army Air Corps (AAC). Military aircraft operated by government agencies and civilian contractors (for example QinetiQ, AirTanker Services, Babcock International) are sometimes also assigned registration numbers from this system.

A serial number is a unique identifier used to uniquely identify an item, and is usually assigned incrementally or sequentially.

In the United States, all military aircraft display a serial number to identify individual aircraft. These numbers are located on the aircraft tail, so they are sometimes referred to unofficially as "tail numbers". On the Northrop Grumman B-2 Spirit bomber, lacking a tail, the number appears on the nose gear door. Individual agencies have each evolved their own system of serial number identification. Aircraft serials are part of the Aircraft Visual Identification System, which also includes the aircraft's tail code and Modex.