machine readable recordsrecords that cannot be viewed or understood without help of some electro-mechanical device such as a computer.
machine-readable recordDigitized and coded information that, in order to be understood, must be translated by a computer or other type of equipment
magnetic mediaAny storage medium in which different patterns of magnetization are used to represent stored bits or bytes of information See also optical disk and…
magnetic tapeA magnetically coated strip of plastic on which analog or digital data can be encoded See also storage media.
mail managementapplication of records management principles and techniques to the flow of mail within the organization
main headingIn indexing, the heading under which a related group of subheadings or other subdivisions belong See also primary subject.
mainframeA class of powerful, general purpose computers that can manage large amounts of data at high speed.
maps and chartsGraphic representation at a reduced scale of selected physical and cultural features of the surface of the earth and other planetary bodies.
Market ValueThe price that the market - any market - sets at a particular time as the price at which an asset can be bought or sold.
masterPertaining to microforms, the master is the original film from which duplicates are made.
material integritythe original shape, form, context, content, structure and substance of a record in the specific physical property and material form in which it was…
MediaAny organization in the business of informing the public with news or commentary.
mediated searchA search for documentary material or information about documentary material during which the person searching is assisted by NARA personnel.
medium(pl.: media) 1. In plant tissue culture, a term for the liquid or solid formulation upon which plant cells, tissues or organs develop.
memoryData storage in the form of chips, or the actual chips used to hold data; storage is used to describe memory that exists on tapes or discs.
menuA list of options, each of which performs a desired action such as choosing a command or applying a particular format to a part of a document.
metadataMetadata is information about a particular data set which may describe, for example, how, when, and by whom it was received, created, accessed, and/or…
metric paper sizeAn international measure for paper based on the subdivisions of a square meter
MICRSee magnetic ink character recognition (MICR).
microficheSheet microfilm (4 by 6) containing reduced images of 270 pages or more in a grid pattern.
microfilmA high-resolution film in roll form containing microimages To record microimages on film See also diazo microfilm, silver halide microfilm, and storage…
microfilm jacketA flat, transparent, plastic carrier with single or multiple film channels made to hold single or multiple film strips
microfilm readerA device that enlarges microimages for viewing, usually consisting of a light source, illuminating optics, microfilm holder, lens, and a screen
microfilm reader/printerA microfilm reader that has the capability of producing a hard copy of the enlarged image
microformAny miniaturized form containing micro images, such as microcards, microfiche, microfilm and aperture cards.
microformsGeneric term for all media containing microimages, such as microfilm or microfiche
micrographicstechnology and processes used to record information on microforms
microimageAn image too small to be read without magnification
mid-term retentionretention of a record for more than ten years but usually less than fifty years (overlapping with long-term retention).
middle-digit filingA numeric filing system in which the middle digits are used as the finding aid to organize the filing system See also primary-digit filing and…
migrationMoving files to another computer application or platform; may require conversion to a different format.
Minute bookA book maintained in state court that contains minute entries of all hearings and trial conducted by the judge.
Mirror ImageUsed in computer forensic investigations and some electronic discovery investigations, a mirror image is a bit-by-bit copy of a computer hard drive that…
Mirror SiteA file server containing a duplicate set of files located in a different geographic area for the purposes of managing heavy traffic, providing security…
mirroringThe duplication of data for purposes of backup or to distribute Internet or network traffic among several servers with identical data.
MIS (Management Information Systems)In general, a computer-based system that provides IT personnel with the necessary tools for categorizing, assessing, and efficiently running an…
mnemonic filingA system to classify files using codes or symbols that have an easily remembered relationship to the actual meaning or function (e.g.
mobile-aisle systemRows of shelving used for compact storage, which travel on tracks and allow one or more aisles to be opened to access the system Also referred to as…
model templateA template created to be copied and modified for the creation of new templates.
monetary valuethe commercial, insurance, or market value of a record expressed in terms of monetary currency. See commercial value; intrinsic value.
munimentsan old-fashioned term for documents that confer authorities, rights, or privileges, and they are used as evidence by which those authorities, rights, or…