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Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...
This article contains a representative list of notable databases and search engines useful in an academic setting for finding and accessing articles in academic journals, institutional repositories, archives, or other collections of scientific and other articles.
General pattern: HB-AAA to HB-ZZZ, with HB-1 to HB-9999 for Gliders and Motorgliders. The registration often denotes the aircraft type and maker. Some examples: HB-Axx two-engined aircraft from 5.7 to 15 tons, Aircraft over 15 tons due to shortage of Jxx.
This is a list of websites that contain lists of chemicals, or databases of chemical information. There is further detail on the content of these and other resources in a Wikibook of information sources . "ACToR".
The National Crime Information Center (NCIC) is the United States' central database for tracking crime-related information. The NCIC has been an information sharing tool since 1967.
Search engines, including web search engines, selection-based search engines, metasearch engines, desktop search tools, and web portals and vertical market websites have a search facility for online databases.
Various national databases of United States persons, and their activities, have been compiled by government and private entities. Different data types are collected by different entities for different purposes, nominal or otherwise. These databases are some of the largest of their kind, [1] and even the largest ever. [2]
Optics Classification and Indexing Scheme (OCIS) is a categorization scheme used to encode the topic of an article or presentation in a 7-digit code. The system is used by the Optical Society of America in the organization of conferences and for journal publications.
The Universal Product Code (UPC or UPC code) is a barcode symbology that is used worldwide for tracking trade items in stores.
CDDB, short for Compact Disc Database, is a database for software applications to look up audio CD (compact disc) information over the Internet. This is performed by a client which calculates a (nearly) unique disc ID and then queries the database.