microfilm recorders - meaning and definition. What is microfilm recorders
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What (who) is microfilm recorders - definition

British Tape Recorders; British tape recorders

IBM microfilm products         
  • Example aperture card
  • IBM Ammonia Bottle
MICROFILM EQUIPMENT MANUFACTURED AND SOLD BY IBM IN THE 1960S
User:AVandewerdt/IBM Microfilm Products; Draft:IBM Microfilm Products; IBM Microfilm Products
IBM manufactured and sold microfilm products from 1963 till 1969. It is an example of IBM attempting to enter an established market on the basis of a significant technical breakthrough.
List of honorary recorders         
WIKIMEDIA LIST ARTICLE
List of Honorary Recorders
This is a list of the current titular and honorary recorders in the Courts of England and Wales, together with the Crown Court venue at which they sit.
List of unrecovered and unusable flight recorders         
WIKIMEDIA LIST ARTICLE
List of unrecovered flight recorders
Flight data recorders (FDRs) and cockpit voice recorders (CVRs) in commercial aircraft continuously record information and can provide key evidence in determining the causes of an aircraft loss. The greatest depth from which a flight recorder has been recovered is , for the CVR of South African Airways Flight 295.

Wikipedia

British Tape Recorder

British Tape Recorders or BTR machines were reel-to-reel tape recorders initially made by EMI in England after World War II. They were the first magnetic tape recorders to be manufactured in Britain, and their design imitated that of the tape recorders used by the Germans during the war. Because these multi-track recorders were painted EMI green, they then became known as the "Green Machines".

The first model made was named the BTR1. The BTR1 machines were first created in 1947, but superseded by the BTR2 mono machine in 1952. The BTR2 was made in greater quantity, being used not only at EMI studios but at the BBC. Many studios later purchased ex-BBC units, so quite a few were found in non-EMI London studios. The BTR3 recorder was initially intended to support 2 or 4 tracks, but the only machines produced were the stereo (2-track) machines, the 4-track version having been rejected at the prototype stage. Only a few of these BTR3s were built, and the only known use of them is at the Abbey Road Studios during the 1960s, where they were used for all stereo recording and disc mastering.

A BTR3 tape recorder, previously used at Abbey Road, was found by former Radio Glen Technical Manager Henry Walmsley, and members of Surge Radio, the student-run radio station of the University of Southampton, at one of the University's Halls of Residence (Glen Eyre Halls) in February 2017. It had been in use at the station—where it was known as 'The Beatle'—until around 2001.

The TR90 was a smaller, more portable unit. It was available in a stereo version, and was used professionally on EMI Remote recordings, as well as at Hayes, EMI's manufacturing complex.

The Otari company made a BTR-5 model recording machine, the initials standing for Broadcast Tape Recorder.

Mono and twin-track BTR reel-to-reel recording machines were used in the making of the first two Beatles albums. Mono and stereo BTR machines were used to mix down the 4 and 8 track masters of later albums recorded on Telefunken, Studer and 3M multi-track machines.