Special Features:

30 light indicators, arranged in seven groups, inscribed ds1 through ds12, ds23 through ds34 and ds42 through ds47;

Properties:

An indicator which displays incremental information derived from discrete electronic signals from another item, such as a computer, on the face of a cathode ray tube, or by means of gaseous discharge type lamps which are part of a decade counting device. The displayed data may be in the form of letters, numerals, symbols, or any combination thereof. For liquid crystal displays or semiconductor type, see also display, optoelectronic. Excludes annunciator and alarm (as modified). See also counter, electronic, digital; indicator, symbol indicating; and voltmeter.