Many of these keyboards were designed for children with small keys and simple preset functions suitable for educational use.
[1] In 1982, the line introduced a card reader system which allowed players to learn and play along with sequenced songs.
Some of the higher-end keyboards have advanced features like programmable synthesizer controls, midi capability, and sampler functions.
[4] Circa 2017, Italian artist Modula released an EP called 780's Chronicles, recorded primarily using a Yamaha PSS780.
[5] Cyril Hahn uses a Yamaha PSS380 in his original compositions, and notes its noise profile as an endearing characteristic.