nd Information Sciences] 
udf 
n., The process of converting records in the usual and ordinary course of business (otherwise the activity is not migration but creation) to maintain their compatibility with a newer generation of hardware and/or software computer technology, while leaving intact their intellectual form. [Archives] 
transmission 
n., The moving of a record across space (from a person or organization to another, or from a system to another), or through time. [Archives] 
trusted custodian 
n., A