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In computer architecture, 32-bit integers, memory addresses, or other data units are those that are at most 32 bits (4 octets) wide. Also, 32-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size. 32-bit is also a term given to a generation of computers in which 32-bit processors were the norm.
The range of integer values that can be stored in 32 bits is 0 through 4,294,967,295 or −2,147,483,648 through 2,147,483,647 using two's complement encoding. Hence, a processor with 32-bit memory addresses can directly access 4 GB of byte-addressable memory.
The external address and data buses are often wider than 32 bits but both of these are stored and manipulated internally in the processor as 32-bit quantities. For example, the Pentium Pro processor is a 32-bit machine, but the external address bus is 36 bits wide, and the external data bus is 64 bits wide.[1]
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Prominent 32-bit instruction set architectures include the IBM System/360, the DEC VAX, the ARM, the MIPS, and the Intel IA-32.
In digital images/pictures, 32-bit can refer to 24-bit truecolor images with an 8-bit alpha channel.
A 32-bit file format is a binary file format for which each elementary information is defined on 32 bits (or 4 Bytes). An example of such a format is the Enhanced Metafile Format.
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32-bit (not comparable)
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   | HOW Stuff Works "How Bits and Bytes work" - HowStuffWorks "How Bits and Bytes Work" |
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