The Campbell Keyboard Corporation was enjoying the
biggest year in its history. High production levels
made
its unit costs low. It was the successful bidder fo
r the Plum Computer’s annual keyboard contract—the
largest
single keyboard sale in the world each year. To wi
n the contract, Campbell promised Plum a state of t
he art,
cordless keyboard with radio frequency range of 100
feet (in free space – no object between the transm
itter and
the receiver).