The Collaborative International Dictionary of English v.0.48:

Cis- \Cis-\
   A Latin preposition, sometimes used as a prefix in English
   words, and signifying on this side.
   [1913 Webster]

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

CIS
       Card Information Structure / Space (PCMCIA)


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

CIS
       Compuserve Information Systems (network)


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

CIS
       Command Information System (mil., USA)


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

CIS
       Contact Image Sensor


Hitchcock's Bible Names Dictionary (late 1800's):

Cis, same as Kish