Wire recording, also known as magnetic wire recording, was the first magnetic recording technology, an analog type of audio storage. It recorded sound signals on a thin steel wire using varying levels of magnetization. The first crude magnetic recorder was invented in 1898 by Valdemar Poulsen. The first magnetic recorder to be made commercially available anywhere was the Telegraphone, manufactured by the American Telegraphone Company, Springfield, Massachusetts in 1903.
A Webster-Chicago Model 7 wire recorder from 1948
Poulsen Telegraphone recorder from 1922.
First US patent issued 1900 for a magnetic wire recorder by inventor Valdemar Poulsen
German Reichhalter Reporter W102 wire recorder (c. 1950)
Magnetic storage or magnetic recording is the storage of data on a magnetized medium. Magnetic storage uses different patterns of magnetisation in a magnetizable material to store data and is a form of non-volatile memory. The information is accessed using one or more read/write heads.
The programmable calculators of the HP-41-series (from 1979) could store data via an external magnetic tape storage device on microcassettes.
Hard drives use magnetic memory to store giga- and terabytes of data in computers.
