However, in a market where the equilibrium price is $5 and the price floor is set at $4, there will be no effect on supply because the price floor must be set higher than the market price in order for it to have an effect on inventories.
In 1983, the portable CD player came as a boon for those who liked to listen to their choice of music while on the go.
Music CD players and CD-ROM players of all kind are so much around now, it's hard to believe the CD (Compact Disc) was just invented in 1982, by Sony and Philips together.