Unix introduced many innovative features that were rare in contemporary operating systems, significantly influencing OS design. Its principles are foundational in current systems like Windows, OS X, and Linux. The document also includes references to flow chart symbols.

1. UNIX incorporated many special features that were either new or uncommon
to operating systems of the time. UNIX revolutionized operating system design,
and many of it’s principles are used in modern operating systems, such as
Windows, OS X, and Linux.

16. Flow chart Symbols