Central processing unit
The central processing unit [CPU] is the portion of 'a computer system' that carries out the instructions of 'a computer program' | to perform the basic arithmetical | logical | and {input/output} 'operations of the system' | [The CPU] plays a role somewhat 'analogous' to [the brain in the computer] | The term has been in use in 'the computer industry' at least since the early {1960s} , [The form] design and implementation of [CPUs] have changed [dramatically] since the earliest examples . but their 'fundamental operation' remains much the same.
[On large machines] {CPUs} require (one [or] more) "printed circuit boards" | On 'personal computers' and 'small workstations' | {the CPU} is housed in a single 'chip' [called] [a microprocessor] | {Since the 1970s} [the microprocessor] class of [CPUs] has almost completely overtaken all other [CPU] implementations | [Modern CPUs] are 'large scale integrated circuits in small' | rectangular packages | with multiple connecting pins |
'Two typical components' of [a CPU] are the arithmetic logic unit (ALU) | which 'performs arithmetic' and 'logical operations' | and [the control unit (CU)] | which extracts instructions from 'memory' and 'decodes' and 'executes them' | calling on the ALU when necessary ...
[Not all] 'computational systems rely on a central processing unit' | [An array processor] or [vector processor] has [multiple parallel computing elements] | with no one unit considered the [center]| {In the distributed computing model} problems are "solved by" ['a distributed interconnected set of processors']
[On large machines] {CPUs} require (one [or] more) "printed circuit boards" | On 'personal computers' and 'small workstations' | {the CPU} is housed in a single 'chip' [called] [a microprocessor] | {Since the 1970s} [the microprocessor] class of [CPUs] has almost completely overtaken all other [CPU] implementations | [Modern CPUs] are 'large scale integrated circuits in small' | rectangular packages | with multiple connecting pins |
'Two typical components' of [a CPU] are the arithmetic logic unit (ALU) | which 'performs arithmetic' and 'logical operations' | and [the control unit (CU)] | which extracts instructions from 'memory' and 'decodes' and 'executes them' | calling on the ALU when necessary ...
[Not all] 'computational systems rely on a central processing unit' | [An array processor] or [vector processor] has [multiple parallel computing elements] | with no one unit considered the [center]| {In the distributed computing model} problems are "solved by" ['a distributed interconnected set of processors']
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