Updated: 05/02/2021 by Computer Hope

A register may refer to any of the following:

1. When referring to a CPU (central processing unit) and memory, the terms internal register, or register refer to the group of latches that store a single character. When referring to a registers size or the amount of bits in a register it is known as the register's width. Instructions flow at a rate that's as large as the register size, which is either 16, 32, or 64-bits wide.


Registers can only handle data that are smaller than their bit size. For example, if a program is designed to process 64-bit instructions, a processor with a 32-bit register would not be able to run that program.

internal register

2. Register describes sending information to a company about yourself or product you have purchased. Registering, in many cases, allows you access to technical support by a company or receive a free product or service.


Most companies do not require online registration, but product activation for operating systems is always required.

3. When referring to sound, a register refers to how high a note sounds. Essentially, a higher register means a higher pitch.

4. When spelled as "registar," it may be a misspelling for register (mentioned above) or a domain name registrar.

Bus, Business terms, CPU terms, Program counter, Register capacity, Registered user, Registration card, Sound terms