What does Tkm stand for?

Turkmenistan (MILB)

Merrill Lynch & Co. - NYSE symbol (SAG)

Takamatsu - Japan - Seismograph station code, US Geological Survey (SEIS)

Takelma - Language code (ETLW)

Total Knowledge Management (TLAA)

TRIS, Potassium Chloride, Magnesium Chloride - A buffer