The graphical user interface didn't yet exist on personal computers 40 years ago, so we needed to understand the command line and batch files. These are still present under the hood on today's computers, and we'll take a long look at why they're still useful. In Short Circuits: Television programs and motion pictures on DVD can cause people with less than perfect hearing to lose some of the dialog. Adding specialized speakers to the television can help a lot. In Spare Parts (only on the website): The Windows Taskbar can get crowded if you often have many applications open or pin a lot of icons to it. Not everything Microsoft puts on the Taskbar by default needs to be there, and it's easy to dump the items you don't need. • If you've ever had a computer report that a Secure Digital card is locked, fixing the problem is usually quick and easy. • Twenty years ago: Visual Basic scripting attacks were common, and I suggested a couple of rules that guaranteed safety. They still apply.