Subject being discussed

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Possible Answers:

TOPIC.

Last seen on: Newsday.com Crossword – May 19 2020

Random information on the term “TOPIC”:

The Combined Cipher Machine (CCM) (or Combined Cypher Machine) was a common cipher machine system for securing Allied communications during World War II and, for a few years after, by NATO. The British Typex machine and the US ECM Mark II were both modified so that they were interoperable.

The British had shown their main cipher machine — Typex — to the US on their entry into the war, but the Americans were reluctant to share their machine, the ECM Mark II. There was a need for secure inter-Allied communications, and so a joint cipher machine adapted from both countries’ systems was developed by the US Navy.

The “Combined Cipher Machine” was approved in October 1942, and production began two months later. The requisite adapters, designed by Don Seiler, were all manufactured in the US, as Britain did not have sufficient manufacturing resources at the time. The CCM was initially used on a small scale for naval use from 1 November 1943, becoming operational on all US and UK armed services in April 1944.

TOPIC on Wikipedia