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{{Short description|Computer architecture bit width}}
{{Computer architecture bit widths}}
In [[computer architecture]], '''
==Range for
A
One important consequence is that a processor with 32-bit [[memory address]]es can directly access at most 4 [[Gibibyte|GiB]] of [[Byte addressing|byte-addressable]] memory (though in practice the limit may be lower).
==Technical history==
[[File:XC68020 top p1160084.jpg|thumb|Motorola 68020 prototype from 1984. It features a 32-bit ALU and 32-bit address and data buses.]]
The world's first stored-program [[electronic computer]], the [[Manchester Baby]], used a 32-bit architecture in 1948, although it was only a [[proof of concept]] and had little practical capacity. It held only 32 32-bit words of RAM on a [[Williams tube]], and had no addition operation, only subtraction.
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