(1) (System 3) See Mac OS.
(2) A batch-oriented minicomputer from IBM. Introduced in 1969, it introduced a new punch card about half the size of previous ones. With the addition of the Communications Control Program (CCP), it could handle interactive terminals. See System/32.
"System/3." YourDictionary, n.d. Web. 15 August 2018. <http://www.yourdictionary.com/system-3>.
System/3. (n.d.). Retrieved August 15th, 2018, from http://www.yourdictionary.com/system-3