register

In computing, a memory location that can be accessed rapidly; it is often built into the computer's central processing unit.

Some registers are reserved for special tasks – for example, an instruction register is used to hold the machine-code command that the computer is currently executing, while a sequence-control register keeps track of the next command to be executed. Other registers are used for holding frequently used data and for storing intermediate results.

register

In music, a set of organ pipes, controlled by one stop, used in registration to produce a characteristic combination of tone and dynamics. Also, a certain vocal or instrumental range of pitches, often associated with a characteristic timbre, for example, the chalumeau register of a clarinet or the head voice register of a singer.