To avoid unauthorised usage of a Microsoft trademark, Unix and Linux free software documentation refer to the key as Super, and it appears as Super in, for instance, system interfaces displaying the current regional keymap. This may confuse some novice users who are only familiar with it as a Windows key, especially if their keyboard labels it as such. In some documentation such as for KDE Plasma, it is called the Meta key even though software has been updated to use the "Super" shift bit.[4][5]