What does TKN stand for?

Taken - Telegraphy (PCTE)

Tek-Net International Ltd. (Canada) - Vancouver Stock Exchange symbol

Teknosis

Thermo Electron Technology (SAUS)

Thermotrex Corp. - AMEX symbol (SPSG)

Toku-No-Shima - Language code (ETLW)

Tokuno Shima - Japan - Airport symbol (OAG)

Total Kjeldahl Nitrogen - Organic analysis

University of Tennessee, at Knoxville (SAUS)

University of Tennessee, Knoxville, TN - OCLC symbol (OCLC)