copies and proof for copyright deposit of old television broadcasts and films. References Further reading Fundamentals of television production, By Ralph Donald and Thomas Spann, Page 188, Ch 9. The History of Television, 1942 to 2000, By Albert Abramson and Christopher H. Sterling, Page 153, Ch 9. External links Sony.com Sony History timeline Total Rewind, U-matic VCRs, Photos and comparison of various Sony U-matic decks Sony U.S. patent for U-matic videotape cassette, filed 1971. Sony U.S. patent for design of U-matic deck, filed 1971. U-matic Pal site Type 2 U-matic U-matic Pal site, History Origination Formats and Machines - 3/4" U-matic transfers in the Experimental Television Center R-VCR, History of Videotape U-matic page Rewind Museum Sony VO-1600. The worlds first VCR. 1971 Texas Commission on the Arts, Videotape Identification and Assessment Guide U-matic PALsite information about the U-matic video format. Lab Guy's World Three Quarter Inch Umatic VCR's Trans Diffusion, Tech Mark, From Baird to MPEG, By Martin Fenton tvhistory.tv VCR and Home Video History Audiovisual introductions in 1971 Discontinued media formats Film and video technology Sony products Videotape