Machine for cleaning compact disc

Machine log system

Machine-readable optical disc with reading-inhibit agent

Machining sensor

Magazine

Magazine for a plurality of recording media

Magazine for read/write disks and method and device for...

Magazine loading device for magnetic video recording and...

Magazine tape recorder deactivating device

Magnesium-beryllium disk drive armset

Magnetic alloys

Magnetic bias coil of a magneto-optical recording apparatus

Magnetic binary data storage system

Magnetic card and apparatus for handling it

Magnetic card and method for the making

Magnetic card handling apparatus

Magnetic card reader-recorder

Magnetic card recording and reproducing systems

Magnetic card recording and/or reproducing apparatus

Magnetic cassette with elastic tensioning belt