4 differences between IBM-PC and IBM-Compatible

What type of computer network ensures high security ?

Quick pl which one of the following is considered a peripheral? a software b mouse c usb connector d motherboard

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.