Octa may refer to:
OCTA is an abbreviation or acronym for:
Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and other European languages, they are used to coin numerous series of words, such as unicycle – bicycle – tricycle, dyad – triad – decade, biped – quadruped, September – October – November – December, decimal – hexadecimal, sexagenarian – octogenarian, centipede – millipede, etc. There are two principal systems, taken from Latin and Greek, each with several subsystems; in addition, Sanskrit occupies a marginal position. There is also an international set of metric prefixes, which are used in the metric system, and which for the most part are either distorted from the forms below or not based on actual number words.
In the following prefixes, a final vowel is normally dropped before a root that begins with a vowel, with the exceptions of bi-, which is bis- before a vowel, and of the other monosyllables, du-, di-, dvi-, tri-, which are invariable.
The Orange County Transportation Authority (OCTA) is the public sector transportation planning body and mass transit service provider for Orange County, California. Its ancestor agencies include not only the prior Orange County Transit District but also such diverse entities as the Pacific Electric Railway and the South Coast Transit Corporation. In 2005, OCTA was judged America's Best Public Transportation System by the American Public Transportation Association, for its record gains in bus and Metrolink commuter trains ridership that it operates or funds. OCTA also operates the 91 Express Lanes.
The Authority's administrative offices are located in the city of Orange and it maintains bus operations bases in the cities of Garden Grove, and Santa Ana. First Transit operates about 33% of OCTA's Fixed Routes out of the Anaheim, & Irvine bases. While MV Transportation operates OCTA's paratransit base for the authority’s ACCESS service also in Irvine.