Ab Initio

(Latin) from the beginning

If you are looking for the Latin term, see ab initio. Ab Initio Software Corporation was founded in the mid 1990's by the former CEO, Sheryl Handler, and several other former employees of Thinking Machines Corporation, after the bankruptcy of that company. The Ab Initio software is a fourth generation data analysis, batch processing, data manipulation graphical user interface (GUI)-based parallel processing tool that is commonly used to extract, transform and load data.
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The Latin term ab initio means from the beginning and is used in several contexts:when describing literature: told from the beginning as opposed to in medias res (meaning starting in the middle of the story)as a legal term: refers to something being the case from the start or from the instant of the act, rather than from when the court declared it so. A judicial declaration of the invalidity of a marriage ab initio is a nullity.in science: A calculation is said to be "ab initio" (or "from first principles") if it relies on basic and established laws of nature without additional assumptions or special models.
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Adverb
1. at the beginning; "at first he didn't notice anything strange"
(synonym) initially, at first, at the start

from first principles. An ab initio calculation is a calculation derived from first principles.

Latin: from the start; from the beginning. - (read more on Ab initio)