KDE is a free and open-source software community best known for Plasma, its desktop environment for Linux and other Unix-like systems, and its website is kde.org. The project has long used distinctive system sounds to mark actions such as logging in, so the startup chime has become a familiar marker for Linux users. Online, people share and reuse the clip in technology videos, tutorials and memes about switching to Linux, customising a desktop or leaving mainstream operating systems behind, keeping it recognisable well beyond its original desktop context.