The mechanism that reads and writes magnetic tape as it moves past. Quality tape recorders have three heads: play (read), record (write) and erase. Many consumer products have only two: one that plays ...

FROM time to time accounts appear of experiments on new kinds of steel which have been undertaken with the object of determining the most suitable material from which to construct a permanent magnet.

A sequential storage medium used for data collection, backup and archiving. The first electronic storage medium, magnetic tape is made of flexible plastic with one side coated with a ferromagnetic ...