Non-print can be classified by physical characteristics as follows:

Audio-visual materials:
        sound recordings
        audiocassettes, compact discs
        videotapes, motion picture films and slides
        maps and globes - geographical sources to locate places
        microforms, e.g. filmstrips, microfilms, microfiche
        artifacts relia - three dimensional objects, hand-made or machine-made
Electronic sources:
        CD ROM
        Online
 

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