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. Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. In medias res, also medias in res ( Latin for "into the middle of things" is a literary and artistic technique where the Narrative A judicial declaration of the invalidity of a marriage ab initio is a nullity. In Conflict of Laws, the issue of nullity (known as Annulment in the United States) in Family Law inspires a wide response among the laws

• 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. First Principles is also the title of a work by Herbert Spencer.

For example, an ab initio calculation of the properties of liquid water might start with the properties of the constituent hydrogen and oxygen atoms and the laws of electrodynamics. Water is a common Chemical substance that is essential for the survival of all known forms of Life. Hydrogen (ˈhaɪdrədʒən is the Chemical element with Atomic number 1 Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the History See also Atomic theory, Atomism The concept that matter is composed of discrete units and cannot be divided into arbitrarily tiny Classical electromagnetism (or classical electrodynamics) is a theory of Electromagnetism that was developed over the course of the 19th century most prominently From these basics, the properties of isolated individual water molecules would be derived, followed by computations of the interactions of larger and larger groups of water molecules, until the bulk properties of water had been determined. In Chemistry, a molecule is defined as a sufficiently stable electrically neutral group of at least two Atoms in a definite arrangement held together by

• in chemistry: an abbreviation referring to ab initio quantum chemistry methods
• in biophysics: a method for the prediction of protein structures in protein folding
• in aviation: The very first stage of flight training. Chemistry (from Egyptian kēme (chem meaning "earth") is the Science concerned with the composition structure and properties Ab initio quantum chemistry methods are Computational chemistry methods based on Quantum chemistry. Biophysics (also biological physics) is an Interdisciplinary Science that employs and develops theories and methods of the Physical sciences for Protein folding is the physical process by which a Polypeptide folds into its characteristic and functional three-dimensional structure. Aviation refers to activities involving man-made flying devices ( Aircraft) including the people organizations and regulatory bodies involved with them

• as part of some educational qualifications: foreign languages may be taken ab initio - for beginners. Education encompasses both the Teaching and Learning of Knowledge, proper conduct, and technical competency

• in computing: Ab Initio is an extract, transform, load tool used to manipulate data. Computing is usually defined like the activity of using and developing Computer technology Computer hardware and software. Ab Initio Software Corporation was founded in the mid 1990's by the former CEO of Thinking Machines Corporation Sheryl Handler, and several other former employees Extract Transform and Load ( ETL) is a process in data warehousing that involves extracting data from outside sources

• in bioinformatics: a term used to define methods for making predictions about biological features using only a computational model without extrinsic comparison to existing data. Bioinformatics is the application of information technology to the field of molecular biology In this context, it may be sometimes interchangeable with the Latin term de novo.

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