32-bit 64-bit Computer Machine Terminologies Difference Explanations

32-bit

Refers to the number of bits that can be processed or transmitted in parallel, or the
number of bits used for single element in a data format. The term is often applied to the
following:

1. Microprocessor: indicates the width of the registers. A 32-bit microprocessor can process data and memory addresses that are represented by 32 bits.
2.  Bus : indicates the number of wires in the bus. A 32-bit bus transmits 32 bits in parallel.
3. Graphics device, such as a scanner or digital camera : specifies the number of bits used to represent each pixel. Typically 24 bits are used for color and the remaining 8 bits are used for control information.
4. Operating system: refers primarily to the number of bits used to represent memory addresses.

64-bit  

64-bit refers to the number of bits (the smallest unit of information on a machine) that
can be processed or transmitted in parallel, or the number of bits used for single
element in a data format. When the term is used in conjunction with a microprocessor, it
indicates the width of the registers#&151; a special high-speed storage area within
the CPU. A 64-bit microprocessor can process data and memory addresses that are
represented by 64 bits. The term is often applied to the following:

1. Microprocessor: indicates the width of the registers.
2.  Graphics device, such as a scanner or digital camera
3. Operating system: refers primarily to the number of bits used to represent memory
   addresses