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| | Central processing unit - Facts, Information, and Encyclopedia Reference article |
 | | If the addition operation produces a result too large for the CPU to handle, an arithmetic overflow flag in a flags register may also be set (see the discussion of integer precision below). |
 | | These types of memory are much slower compared to registers, both due to physical limitations and because they require more steps to access than the internal registers. |
 | | However, compared to the registers, this external memory is usually more inexpensive and can store much more data, and is thus still necessary for computer operation. |
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