3. When and what was the first operating system which integrated security into its core function? Solution 1)Multics was the first operating system used to integrate security as its core functions. 2)planning and development for Multics started in 1964, in Cambridge, Massachusetts. 3)In 1970 GE\'s computer business including Multics was taken over by Honeywell. 4)Virtually all modern operating systems are heavily influenced by Multics.