Magnetic record
A magnetic sound disk was a sound carrier that records on a disk by magnetization. The functional principle is similar to a modern hard drive . It was introduced in 1948 and later by dictation tape and compact cassette displaced.
Web links
- Discussion about rare sound carriers, with a photo of a magnetic record ; Retrieved September 24, 2011
Individual evidence
- ↑ www.stoneworker.ch: Milestones in Communication: A look back at the centuries 1900 to 2000. Accessed September 24, 2011