A register may refer to any of the following:
1. When referring to a CPU, the terms internal register, internal data bus, or register refer to how much information a processor can work at once and how it moves within the chip. The register size can be 16, 32, or 64-bits wide, which allow instructions up to the register size. If a program is designed to process 64-bit instructions, a processor with a 32-bit register would not be able to run the program.
2. Register is also a term that describes the process of sending information to a company about yourself or product you have purchased. Registering in many cases allows you access to technical support by that company or receive a free product or service.
Tip: Almost every company does NOT require registration or online registration, but activation is always required.
3. When referring to sound, a register refers to the tone of the sound.