e smallest meaningful units of information, expressed as continuous electronic signals or mechanical patterns affixed to an analogue medium. [Sciences] 
analogue object 
n., An analogue component, or group of components, that is affixed to an analogue medium and is treated and managed as a document. [Archives] 
analogue system 
n., The use of continuously variable electronic signals or mechanical patterns rather than discrete numeric values (such as those generated by a digital system). [Sciences] 
analogue