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The range of integer values that can be stored in 32 bits is 0 through 4,294,967,295. Hence, a processor with 32-bit memory addresses can directly access 4 GiB 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]
Architecture Prominent 32-bit instruction set architectures include the IBM System/360 and its 32-bit successors, the DEC VAX, the ARM architecture, the MIPS architecture, and the Intel IA-32. Images In digital images/pictures, 32-bit can refer to 24-bit truecolor images with an 8-bit alpha channel. Alternatively it may refer to 32-bit per channel rather than 24-bit colour + 8-bit alpha. 32-bit per channel images are used to represent values brighter than white; these values can then be used to more accurately retain bright highlights when either lowering the exposure of the image or when it is seen through a dark filter or dull reflection. An example of this is the reflection seen in an oil slick; even though the reflection is only a fraction of that seen in a mirror surface, the reflection of highlights can still be seen as bright white areas, not dull grey shapes. 32-bit file format 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. See also References External links ca:32 bits cs:32bitov de:32-Bit-Architektur es:32 bits fr:Architecture 32 bits ko:32 id:32-bit it:32 bit ms:32-bit nl:Woordbreedte ja:32 pl:Architektura 32-bitowa pt:32 bits ru:32 simple:32-bit zh:32
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