Pentium N. The Name Given To Intel's P5 Chip, The Successor To The 80486.

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Pentium n.

The name given to Intel's P5 chip, the
successor to the 80486. The name was chosen because of difficulties
Intel had in trademarking a number. It suggests the number five
(implying 586) while (according to Intel) conveying a meaning of
strength "like titanium". Among hackers, the plural is
frequently `pentia'. See also Pentagram Pro.

Intel did not stick to this convention when naming its P6 processor
the Pentium Pro; many believe this is due to difficulties in
selling a chip with "sex" in its name. Successor chips have been
called `Pentium II' and `Pentium III'.