title: Ab initio (disambiguation)
text: # Ab initio (disambiguation)
  
  Ab initio is a Latin term used in English, meaning from the beginning.
  
  Ab initio may also refer to:
  
  * Ab Initio (company), an ETL Tool Software Company in the field of Data Warehousing.
  * Ab initio quantum chemistry methods
  * Marriages annulled under the Catholic Church are considered as annulled ab initio, meaning that the marriage was invalid from the beginning
  