PotatOS

POTaDOS refers to Portal 2, in which GLaDOS is transferred out of Aperture Science's central CPU and into a small potato-battery powered computer chip. In this form, GLaDOS was able to accompany Chell through old parts of the Aperture Laboratories previously unavailable to her surveillance. During her travels with Chell, GLaDOS witnesses a painting of Aperture's founder Cave Johnson which begins to jog her memory about Caroline.