Walkman
device · 1979 · Digital age
Sony’s portable cassette player.
What it is made of
- Headphones — has part. Headphones.
- Electric motor — has part. A motor.
Principles and materials it uses
- Compact cassette — uses. Cassettes.
- Plastic — is made of. The case is plastic and aluminium.
- Aluminium — is made of. Aluminium.
History: what it evolved from and what it influenced
- MP3 player — evolved into. The digital successor of the portable player.