The Collaborative International Dictionary of English v.0.48:

-ics \-ics\
   A suffix used in forming the names of certain sciences,
   systems, etc., as acoustics, mathematics, dynamics,
   statistics, politics, athletics.
   [1913 Webster]

   Note: The names sciences ending in ics, as mathematics,
         mechanics, metaphysics, optics, etc., are, with respect
         to their form, nouns in the plural number. The plural
         form was probably introduced to mark the complex nature
         of such sciences; and it may have been in imitation of
         the use of the Greek plurals ?, ?, ?, ?, etc., to
         designate parts of Aristotle's writings. Previously to
         the present century, nouns ending in ics were construed
         with a verb or a pronoun in the plural; but it is now
         generally considered preferable to treat them as
         singular. In Greman we have die Mathematik, die
         Mechanik, etc., and in French la metaphysique, la
         optique, etc., corresponding to our mathematics,
         mechanics, metaphysics, optics, etc.
         [1913 Webster]

               Mathematics have for their object the
               consideration of whatever is capable of being
               numbered or measured.              --John
                                                  Davidson.
         The citations subjoined will serve as examples of the
         best present usage.
         [1913 Webster]

               Ethics is the sciences of the laws which govern
               our actions as moral agents.       --Sir W.
                                                  Hamilton.
         [1913 Webster]

               All parts of knowledge have their origin in
               metaphysics, and finally, perhaps, revolve into
               it.                                --De Quincey.
         [1913 Webster]

               Mechanics, like pure mathematics, may be
               geometrical, or may be analytical; that is, it
               may treat space either by a direct consideration
               of its properties, or by a symbolical
               representation.                    --Whewell.
         [1913 Webster]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ICS
       IBM Cabling System


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ICS
       International Classification for Standards (ISO)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ICS
       Internet Connection Sharing (MS, IE, DHCP)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ICS
       Irish Computer Society (org., Irland)