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A digital object identifier (DOI) is a persistent identifier or handle used to uniquely identify various objects, standardized by the International Organization for Standardization (ISO). [2] DOIs are an implementation of the Handle System ; [ 3 ] [ 4 ] they also fit within the URI system ( Uniform Resource Identifier ).
The check digit is calculated as follows: Each number digit is multiplied by two to the power of the labels's position minus two. Thus, the first digit (line 2) is multiplied by 1, the second by 2, the third by 4, the fourth by 8 and so on, until the 10th, which is multiplied by 512. The sum of all these numbers modulo 11 is the check digit. [13]
The 21 top-level 2-digit "region" of hydrologic unit boundaries, using the HUC geocode conventions. Strictly speaking, the "name" related to a geocode is a toponym , and the table (e.g. toponym to standard code) is the resource for toponym resolution : is the relationship process , usually effectuated by a software agent, between a toponym and ...
Mode 1: military only; provides 2-digit octal (6 bit) "mission code" that identifies the aircraft type or mission. [21] Mode 2: military only; provides 4-digit octal (12 bit) unit code or tail number. [22] Mode 3/A: military/civilian; provides a 4-digit octal (12 bit) identification code for the aircraft, assigned by the air traffic controller.
Unambiguous item identification in accordance with the STANAG 3151 standard. This identification takes place utilizing a NATO Stock Number (NSN), which is composed of a 4-digit NATO Supply Classification Code, a 2-digit code for the National Codification Bureau (NCB) representing the country that codifies the item, and a 7-digit non-significant number that is assigned by this NCB.
The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [6] [7] [8] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [9] the pattern of the position detection markers was determined by finding the least-used sequence of ...
An individual’s PIN is the four-digit code they set after opening a debit account with their bank of choice. It is used as a layer of authentication when they perform an electronic transaction ...
The Electronic Product Code (EPC) is designed as a universal identifier (using an idiosyncratic numerical code for each different commodity [1]) that provides a unique identity for every physical object anywhere in the world, for all time. The EPC structure is defined in the EPCglobal Tag Data Standard, [2] which is