WordNet (r) 3.0 (2006):

cert
    n 1: an absolute certainty; "it's a dead cert"

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

CERT
       Computer Emergency Response Team (DARPA, CMU, Internet)


The Free On-line Dictionary of Computing (30 December 2018):

Computer Emergency Response Team
CERT

    (CERT) An organisation formed by DARPA in
   November 1988 in response to the Internet worm incident.
   The CERT charter is to work with the Internet community to
   help it responf to computer security events involving Internet
   hosts, to raise awareness of computer security issues and to
   conduct research targeted at improving the security of
   existing systems.  CERT products and services include 24-hour
   technical assistance for responding to computer security
   incidents, product vulnerability assistance, technical
   documents and tutorials.

   CERT Home (http://cert.org/).

   E-mail:  (incident reports).

   Telephone +1 (412) 268 7090 (24-hour hotline).

   (2012-05-18)