Apple has named its several Operating Systems System 1 to 7, then Mac OS 8 and 9. Currently, it is called OS X, a good Roman-Numeral based name. However, when time comes to renew the product, They will face a dilemma: Continue the Roman naming scheme, go back to an older one, or devise a new one Going back to an older one would seem antiprogressive, and continuing with the Roman system would lead to confusion: OS XI. Is it [Oh ess ex eye] Or [Oh ess ksi] Some might actually confuse it with [Oh ess ex the first]. Greek letter Xi (pronounced [ksi]) fills the requirement for XI, and also, when said aloud, sounds remarkably like "Oh, sexy!", undoubtedly a good advertising technique in the young demographic Apple targets. Also, a good logo would be quite easy to recall and market, thus benefiting both Apple and the customers. NOTE: Due to restricted capabilities of this petition site, the letter Xi cannot be rendered. It is composed of three horizontal lines one above the other, the middle one slightly narrower. check it at http://en.wikipedia.org/wiki/Xi_(letter)