Linux
Originally seen as a bearded penguin (a reference to Tux, the penguin mascot of the kernel program Linux), the more friendly image of a girl with helmet and flippers was chosen as a human alternative. Her helmet usually has horns on it, likely a reference to the GNU operating system whose components usually combine the system programs in Linux systems (hence GNU/Linux). The gear-teeth on the helmet is a reference to KDE, a common desktop environment used with GNU/Linux. Also, the foot symbol on her shirt is a reference to GNOME, another common desktop environment. She is often seen with a spear that has flags attached representing the GRUB, LILO and GCC tools for GNU/Linux. The helmet and spear most likely reference the high level of attention to security (defensive helmet) and hacking (offensive spear) found in Linux applications.
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