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This assigns full sentences to each of 48 different numbers, which are spelled out in the message and preceded by the procedure word "ARL". For example, "ARL FORTY SIX" is the brevity code for "Happy birthday", and is expanded upon delivery outside of the NTS system to "Greetings on your birthday and best wishes for many more to come.".
The code is used to transmit standard messages, sometimes with customized text, very quickly by experienced ARRL National Traffic System (NTS) message traffic handlers. In use, ARRL Numbered Radiograms are messages encoded as one or two numbers. The numbers are always written down as words, and are always preceded by the procedure word "ARL".
Visual representation of traffic passing of ARRL radiograms between various nets, from Wisconsin to California. The National Traffic System (NTS) is an organized network of amateur radio operators sponsored by the American Radio Relay League for the purpose of relaying messages throughout the U.S. and Canada.
The first venture to be undertaken by ARL was a project for the collection of data regarding manuscript collections. This project had little support and was relatively short-lived. [ 1 ] However, the second project, the annual listings of the titles of the PhD theses was a significant contribution to the profession.
The ARRL publishes various technical books and online courses. Members of the organization also have access to a special Members Only section of the ARRL web site that includes technical documents, expanded product reviews of amateur radio equipment, expanded contesting information, and a searchable database of all league publications.
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A PDF file is organized using ASCII characters, except for certain elements that may have binary content. The file starts with a header containing a magic number (as a readable string) and the version of the format, for example %PDF-1.7. The format is a subset of a COS ("Carousel" Object Structure) format. [23]