CGC meaning in Computing ?

The 2016 Cyber Grand Challenge (CGC) was a challenge created by The Defense Advanced Research Projects Agency (DARPA) in order to develop automatic defense systems that can discover, prove, and correct software flaws in real-time.

The event placed machine versus machine (no human intervention) in what was called the "world's first automated network defense tournament."

The final event was held on August 4, 2016 at the Paris Hotel & Conference Center in Las Vegas, Nevada within the 24th DEF CON hacker convention.

It resembled in structure the long-standing "capture the flag" (CTF) security competitions, and the winning system indeed competed against humans in the "classic" DEF CON CTF held in the following days.The Cyber Grand Challenge featured, however, a more standardized scoring and vulnerability-proving system: all exploits and patched binaries were submitted and evaluated by the referee infrastructure