Complex systems have many subsystems, layers of control, and loops.

What do character formats do for your document's message? a.set the tone b.provide organization c.provide clarity d.set how texts align with documents

Anetwork security application that prevents access between a private and trusted network and other untrusted networks

Write a program that asks the user to enter the name of an input file. if the file does not exist, the program should prompt the user to enter the file name again. if the user types quit in any uppercase/lowercase combinations, then the program should exit without any further output.