At the conceptual level, hacking is pretty straightforward. To attack personal computers through modems, for example, a hacker will start by scanning for vulnerable systems. They may use "demon dialers" or "wardialers" to make repetitive phone calls to modems on the public Internet. To find DSL or cable openings, hackers will use port-scanner programs that repeatedly "ping" IP addresses of networked systems to see if there are openings. Then, hackers will do all sorts of things next... (Photo by Dave Martin / Getty Images)

It's not a trivial thing: youths will threaten, stalk, insult, degrade, and humiliate other young people online. Because it is so easy to do, this shameful cyberbullying is commonplace, and very psychologically hurtful. About.com describes cyberbullying, and how to help prevent it...

You will hear the expression "lolcats" in your daily email life, or even hear it at the office. But what exactly is this popular Internet meme? About.com explains lolcats and Icanhazcheezburger...

Cloud computing really is a strange concept for most people. The idea of using the Internet as your computer platform is hard to wrap the mind around. But there is a definite trend towards cloud computing, and its core concept, "software as a service". About.com explains the basics of cloud computing and SaaS here...