-tos

from The Collaborative International Dictionary of English v.0.48

Vigesimo-quarto \Vi*ges"i*mo-quar"to\, n.; pl. {-tos}.
   A book composed of sheets each of which is folded into
   twenty-four leaves; hence, indicating more or less definitely
   a size of book so made; -- usually written 24mo, or 24[deg].
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Anito \A*ni"to\, n.; pl. {-tos}. [Sp.]
   In Guam and the Philippines, an idol, fetich, or spirit.
   [Webster 1913 Suppl.]

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

TOS
       Tape Operating System (OS, RCA Spectra 70)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

TOS
       Teletype Operating System (OS, Microdata)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

TOS
       The Operating System (Atari, OS)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

TOS
       Tramiel Operating System (Atari, OS)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

TOS
       Type Of Service (IP)