Mastering the C programming language - a classic code environment used to build software, apps, and whole operating systems - is a great skill, and Mac OS X makes it easy to learn.

Terminal is a versatile command line system that comes with every Mac computer. Here's how to open Terminal on a Mac, with a few commands you can use.

Buried underneath your Mac's pretty interface is a decades-old backbone called UNIX, and you can use its old-school Terminal for running simple commands that aren't accessible from the apps or ...