TCN

TCN is the Sydney flagship television station of the Nine Network in Australia and is located at Willoughby. The licence, issued to a company named Television Corporation Ltd headed by Frank Packer, was one of the first four licences (two in Sydney, two in Melbourne) to be issued for commercial television stations in Australia. TCN-9 is the home o...
Found on http://en.wikipedia.org/wiki/TCN

TCN

abbreviation: Terminal Change Notice (changes to FLIPs of TPPs between regular editions)
Found on http://www.encyclo.co.uk/local/20021

TCN

TACAN
Found on http://www.f-16.net/glossary-T.html

TCN

Tetracycline
Found on http://www.translationdirectory.com/glossaries/glossary124.htm
No exact match found