System was originally intended for military use, same as the Internet, but it has since become an indispensable tool for millions in determining how to drive from point A to point B in their cars using popular devices like the TomTom.
USB drives. Using storage as fast as RAM and nearly as capacious as a hard drive, these portable devices have replaced the venerable floppy disk and all other would-be successors.
Digital photography. Virtually everything exciting these days about photography is digital, from cameras and photo editing software to printers and photo sharing Web sites. As a common digital technology theme, digital photography lets you do more yourself, more quickly, with more people.
Reid Goldsborough is a syndicated columnist and author of the book Straight Talk About the Information Superhighway. He can be reached at firstname.lastname@example.org or www.reidgoldsborough.com.