A professional who classifies materials according to subject matter and assigns numbers or symbols from predetermined coding system to facilitate accurate filing and reference. Responsibilities include:

• Scans correspondence, reports, drawings, and other materials to be filed to determine subject matter.
• Ascertains specified number or symbol, using code book or chart, and marks or stamps code on material.
• Assigns cross-indexing numbers if subject matter should be classified and filed under more than one heading.
• May revise coding system to improve code usage.