WordNet (r) 3.0 (2006):

slingshot
    n 1: a plaything consisting of a Y-shaped stick with elastic
         between the arms; used to propel small stones [syn:
         slingshot, sling, catapult]

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

Slingshot

    CSK
   Software's real time financial server for the Internet.

   Slingshot allows the delivery of real time market data across
   the Internet and private intranets quickly, cheaply and
   securely.  The first beta-test version was released free to
   the Internet on 6 August 1996.  Slingshot allows any financial
   institution, regardless of size, to publish their rates and
   associated information to a global audience using standard
   Internet protocols and software.  The real-time data can be
   seamlessly integrated into any standard web
   application and thus combined with static text, database
   queries and even audio and video objects, to create services.

   The Slingshot protocol enables the delivery of other forms of
   real time data over the Internet, thus making Slingshot useful
   in industries as varied as manufacturing, betting, telemetry,
   weather, transport and medicine.

   Version 2's improved protocol minimises the required
   bandwidth and can go through firewalls, proxies, and
   virus scanners, making Slingshot real-time data accessible
   everywhere where normal web access is possible.

   (2003-05-13)