Similarly, 32-bit computing, CPU or 32-bit programming uses 32 bits (four octets/bytes) for all the above purposes. From the software perspective, 64-bit computing means the use of code with 64-bit virtual memory addresses. Also, 64-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size. In computer architecture, 64-bit computing is the use of processors that have datapath widths, integer size, and memory addresses widths of 64 bits (eight octets/bytes).
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