Magnetic tape units for computers; computer memory devices; camcorders; video cassettes; video telephones; video screens; viewfinders, photographic; holograms; plotters; diaphragms photography; floppy disks; sound recording discs; disks, magnetic; optical discs; disk drives for computers; juke boxes for computers; DNA chips; measuring instruments; interfaces for computers; cinematographic cameras; carriers for dark plates photography; spools photography; cinematographic film, exposed; compute...