Back in the days of dial-up internet, it was commonplace to build your own computer. Instead of walking into a Best Buy or logging onto Dell's website to shop for a complete unit, you'd assemble a desktop PC yourself using standardized, commodity parts purchased either online or at a store specializing in computer components. These days, most consumers have only ever bought pre-fab systems, no assembly required. However, many gamers and computer hobbyists still prefer to roll their own boxes.