When was the PC modem invented?

What operating system is a smartphone most likely to use? 1.bsd 2.mac os x 3.symbian 4.linux

Which are steps taken to diagnose a computer problem? a) reproducing the problem and using error codes b) reproducing the problem and troubleshooting c) using error codes and troubleshooting d) using error codes and stepping functions

Write pseudocode to represent the logic of a program that allows the user to enter a value. the program multiplies the value by 10 and outputs the result.