More generally: any apparatus for automatically measuring the quantity of something passing through it. In extended use: a device for automatically…

A stamped mark indicating a time and date, used on posted envelopes, tickets, etc.; an adjustable stamp used to make such a mark. Cf. date stamp, n.

An instrument that indicates or records physical measurements or other data obtained remotely and transmitted to it, chiefly by means of…

A device which records data on ‘ticker’ tape. Obsolete.

a meter which is operated by inserting a coin in a slot.

(a) an instrument used to test the accuracy of electricity meters; (b) a meter used to measure the amount of gas or electricity used in a separate…

Any of various proprietary devices for producing or viewing photographic records of a large number of similar documents, such as bank cheques or…

The proprietary name of a process for copying documents by means of infra-red radiation, and of a type of overhead projector employing copies made…

= ultrafiche, n.

A microfiche in which the linear reduction of the image size is of the order of 100 or more; documentary material of this kind.

Also electronic tag. An electronic device attached to a person or thing for monitoring purposes, esp. to record the movements of mental patients…