System for protecting newly installed disk units

System for random access to information on a magnetic tape

System for random, time accurate access to recorded material

System for recording and reproducing data having scheme for...

SYSTEM FOR RECORDING AND/OR REPRODUCING INFORMATION,...

System for recording track-centering servo signals on multi-trac

System for reducing controller delays during sequential data...

System for reducing phase error in multitrack magnetic recording

System for reproducing a video signal recorded in parallel track

System for resetting sensor magnetization in a spin valve magnet

System for selectively interfacing information carriers by physi

System for self-servowriting a disk drive

System for storing data in a separate memory when the number of

System for the electronic editing of video signals

System for the reproduction of signals stored on a magnetic tape

System for the sub-micron positioning of a read/write transducer

System for transmitting signals via a record carrier in the form

System for writing and reading digital data interspersed with an

System of disk device selector circuits for disk controller

System using superimposed, orthogonal buried servo signals