(1) To sign up for something, see
registration.
(2) A small, high-speed computer circuit that holds values of internal operations, such as the address of the instruction being executed or the data being processed. When a program is debugged, register contents are analyzed to determine the computer's status at the time of failure.
64-Bit Computers Mean 64-Bit Registers
The 8-, 16-, 32- and 64-bit designations of a CPU disclose the size of its internal data registers and the amount of data they can handle in one operation. For example, a 32-bit register holds four bytes.
The address register, which holds the addresses of the data may be the same size or different than the data registers. Address registers must be large enough to hold the address of the highest memory location. See
address register,
LOAD and STORE and
assembly language.