Lubuntu is a fast and lightweight operating system developed by a community of Free and Open Source enthusiasts. Lubuntu uses the minimal desktop LXDE (Lightweight X11 Desktop Environment), and a selection of light applications. The core of the system is based on Linux and Ubuntu. Basically Lubuntu focus on speed and energy-efficiency. Because of this, Lubuntu has very low hardware requirements, it is intended to have low-resource system requirements and is designed primarily for netbooks, and older PCs. Tests show it can use half as much RAM as Xubuntu, making it an attractive choice for installing on older hardware being refurbished for charitable distribution.