Sight-saving books -- See Large type books Here are entered books set in a type size larger than normal for the benefit of persons with impaired vision, as well as works about such books.
Sigillography -- See Seals (Numismatics) Here are entered works on devices, such as emblems, symbols or words, used to authenticate writings or documents. --subdivision Seal under names of countries, cities, etc., and under names of individual persons and corporate bodies
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SIGINT (Electronic surveillance) -- See Electronic surveillance Here are entered general works on the monitoring of events from remote or secret locations by electronic means in the fields of law enforcement, criminal investigation, espionage, remote sensing for scientific purposes, etc.
Signals intelligence -- See Electronic surveillance Here are entered general works on the monitoring of events from remote or secret locations by electronic means in the fields of law enforcement, criminal investigation, espionage, remote sensing for scientific purposes, etc.
