Character any letter, number, symbol or punctuation mark found in a writing sample
Chromatography a method of separating materials by size through capillary action.
It uses two phases: stationary solid phase where material is not moving and mobile liquid phase where particles are migrating through a medium with a solvent.
Exemplar a sample of writing obtained from a known source
Indented writing deformation of paper due to pressure applied by writing instrument which may persist to subsequent pages
Natural variation range of normal changes found in an individual’s handwriting
Nonrequest writing any writing sample from everyday life such as lists, forms, business transactions, and letters
Obliterations intentional destruction of writing by overwriting with additional marks (not erasure)
Questioned document any document in whole or in part containing marks of unknown origin or authorship
Request writing sample of writing collected using a prescribed text as part of an investigation
Security features specialized marks, devices used to prevent duplication, alteration, or counterfeiting such as microprint, colored fibers, watermarks, dyes, and magnetic stripes
Signature an individual mark chosen to serve as a personal sign of authorship. It may be the full and actual name or a stylized version or symbol.
Finger bones are identified in their position related to the midline of the body.
Proximal is closest to midline.
Medial is in between.
Distal is the farthest from midline. | 
