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NNNNN for PO Boxes. NNNNN-NNNN for home delivery. A complete 13-digit code has 5-digit number representing region, sector, city, and zone; 4-digit X between 2000 and 5999; 4-digit Y between 6000 and 9999. [22] Digits of 5-digit code may represent postal region, sector, branch, section, and block respectively.
A linear code of length n and dimension k is a linear subspace C with dimension k of the vector space where is the finite field with q elements. Such a code is called a q -ary code. If q = 2 or q = 3, the code is described as a binary code, or a ternary code respectively. The vectors in C are called codewords.
A radio direction finder (RDF) is a device for finding the direction, or bearing, to a radio source. The act of measuring the direction is known as radio direction finding or sometimes simply direction finding (DF). Using two or more measurements from different locations, the location of an unknown transmitter can be determined; alternately ...
The Parsons code, formally named the Parsons code for melodic contours, is a simple notation used to identify a piece of music through melodic motion – movements of the pitch up and down. [1] [2] Denys Parsons (father of Alan Parsons [3] ) developed this system for his 1975 book The Directory of Tunes and Musical Themes .
RFinder ("repeater finder") is a subscription-based website and mobile app. RFinder's main service is the World Wide Repeater Directory ( WWRD ), which is a directory of amateur radio repeaters. RFinder is the official repeater directory of several amateur radio associations. RFinder has listings for several amateur radio modes, including FM, D ...
This board at Geneva Airport shows airline codes including AC (Air Canada), LX (Swiss) and AZ (ITA Airways). IATA airline designators are used to identify an airline for commercial purposes in reservations, timetables, tickets, tariffs, air waybills and in telecommunications . A flight designator is the concatenation of the airline designator ...
The two-face icon for Finder on Mac dates back to the early days of Mac OS, and at this point I think we've all just assumed that it will pretty much always be around. Sure, it's gotten a few ...
The United States Flag Code establishes advisory rules for display and care of the national flag of the United States of America. It is part of Chapter 1 of Title 4 of the United States Code ( 4 U.S.C. § 5 et seq ). Although this is a U.S. federal law, [1] the code is not mandatory: it uses non-binding language like "should" and "custom ...