LainOS is a lightweight, Arch Linux-based desktop distribution aimed at developers, tinkerers and hackers. As a choice of graphical environments, it offers the Hyprland Wayland compositor and the Openbox window manager. The distribution also features the Calamares system installer, personalised yet functional visual aesthetics, and a selection of useful software. LainOS is intended for users who share the admiration of Serial Experiments Lain, a Japanese anime television series.