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 "hex" or "sex" in its name. Successor chips have been called `Pentium II', `Pentium III', and `Pentium IV'.