Like mass-produced computers, barebones systems and computer kits are often targeted to particular types of users, and even different age groups. Because many home computer builders are gamers, for example, and because gamers are often young people, barebones computers marketed as "gaming systems" often include features such as neon lights and brightly coloured cases, as well as features more directly related to performance such as a fast processor, a generous amount of RAM, and a powerful video card. Other kits and barebones systems may be specifically marketed to users of a free software operating system such as Linux or one of the BSD variants, with components guaranteed for compatibility and performance with that operating system.