Talk:Digital current loop interface
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In the Loop
I believe the ability to connect multiple receivers into a current loop is the true origin of the expression(s) "in (out of) the loop". This was once a common practice with teletype circuits to newsrooms. E.g. search this page for "Provided a simple form of networking:".
Can anyone find a better reference - perhaps a more etymological one? Shannock9 (talk) 08:11, 16 June 2013 (UTC)