# Preserving

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**Complete lattice**— In mathematics, a complete lattice is a partially ordered set in which all subsets have both a supremum (join) and an infimum (meet). Complete lattices appear in many applications in mathematics and computer science. Being a special instance of… …102

**Glass-Steagall Act**— The Glass Steagall Act of 1933 established the Federal Deposit Insurance Corporation (FDIC) in the United States and included banking reforms, some of which were designed to control speculation. [cite web… …103

**Rotation group**— This article is about rotations in three dimensional Euclidean space. For rotations in four dimensional Euclidean space, see SO(4). For rotations in higher dimensions, see orthogonal group. In mechanics and geometry, the rotation group is the… …104

**Two's complement**— The two s complement of a binary number is defined as the value obtained by subtracting the number from a large power of two (specifically, from 2 N for an N bit two s complement).A two s complement system or two s complement arithmetic is a… …105

**Digitizing**— Digitizer redirects here. This article covers the general concept of digitization for other uses, see Digitizer (disambiguation). Digitizing old slides at home by photographing their projections using a slide projector, tripod, and digital camera …106

**Normal mapping**— used to re detail simplified meshes. In 3D computer graphics, normal mapping, or Dot3 bump mapping , is a technique used for faking the lighting of bumps and dents. It is used to add details without using more polygons. A common use of this… …107

**Wood preservation**— All measures that are taken to ensure a long life of wood fall under the definition wood preservation (timber treatment). Apart from structural wood preservation measures, there are a number of different (chemical) preservatives and processes… …108

**Sizing**— or size is a substance that is applied to porous materials as a glaze or filler. It is used to change surface properties in papermaking, gilding, and the manufacture of textiles. Papermaking Sizing is used on fibers during paper manufacture in… …109

**Euclidean group**— In mathematics, the Euclidean group E ( n ), sometimes called ISO( n ) or similar, is the symmetry group of n dimensional Euclidean space. Its elements, the isometries associated with the Euclidean metric, are called Euclidean moves.These groups… …110

**Acid-free paper**— is paper that has a neutral or basic pH (7 or slightly greater). It addresses the problem of preserving documents for long periods. Overview Paper made from wood based pulp that has not had its lignin removed goes yellow and deteriorates over… …