Ab initio (disambiguation)

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The Latin term ab initio means from the beginning and is used in several contexts:

  • Marriages annulled under the Catholic Church are considered as ab initio, meaning that the marriage was invalid from the beginning. See Annullment.
  • ab initio quantum chemistry methods, chemistry term sometimes abbreviated to ab initio
  • Ab Initio is an extract, transform, load tool used to manipulate data in computing
  • referring to a trainer (aircraft) used for basic training