RE: https://cyberplace.social/@GossiTheDog/117334191597306849
Microsoft shipped Cortana, named for the Master Chief's AI companion, forcing OEMs to put a dedicated Cortana button on their keyboards. Shortly afterwards in the Halo storyline, Cortana takes a heel turn and goes insane, so while Microsoft's Cortana is eventually discontinued here in real life everyone who bought a computer during this period has a keyboard with a dedicated but non-functional Malevolent AI Villain button on it.