(1) To select an element by clicking or tapping.
(2) A format code used in a document language. See tagged text, HTML tag, character tag and paragraph tag.
(3) See RFID tag and smart tags.
(4) A set of bits or characters that identifies various conditions about data in a file and is often found in the header records of such files. This type of tag identifies the entire file, and the tags occupy pre-defined locations in the header rather than embedded throughout the file.
(5) A name (label, mnemonic) assigned to a data structure, such as a field or record. See XML document.
(6) A descriptive field in a music or video file. See ID3 tag.
(7) A field that identifies the contents of a data record. See key field.
(8) A brass pin on a terminal block that is connected to a wire by soldering or wire wrapping.
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