Register is a group of –

A Register is a temporary storage unit that holds data, instructions, or addresses.

• The Building Block: A single Flip-Flop is a bistable multivibrator that can store exactly one bit of information (a 0 or a 1).

• The Grouping: To store more than one bit, multiple flip-flops are connected in parallel. For example, an 8-bit register consists of a group of 8 flip-flops sharing a common clock signal.