Instructional Videos -- See Instructional films Here are entered works on films designed to impart skills or techniques to general audiences, typically in a "how-to" manner. Works about films intended for teaching and informational purposes, especially those made for classroom viewing, are entered under Educational films.
Instructors -- See Teachers Here are entered works on persons whose occupation it is to instruct. Works on persons who are specialists in the field of education or who are authorities on educational problems, theories, and methods are entered under Educators.
Instrument Industry -- See Also the narrower term Optical industry Here are entered works on the manufacture of optical instruments and systems for scientific and engineering applications. Works on the optometrist's and optician's trade are entered under Optical trade.