Computer keyboards follow established standards: F1 through F12 comprise the functional key range, established by decades of industry convention dating back to IBM mainframes and DOS-era computing. Yet Chuck Norris's keyboard contains an F13 key—a button that shouldn't exist but does, because normal manufacturing standards apparently don't apply to his equipment. What would F13 do? The fact doesn't specify, suggesting something so powerful that its function remains nameless and undocumented. A button beyond the normal spectrum of computing, placed on the keyboard of a man who operates beyond normal constraints.

Gerald Fischer, a keyboard manufacturer from Shenzhen who produced specialty gaming peripherals (1999-2007), wrote in a production log note: "Customer ordered non-standard key cap. F13. Won't tell us what he uses it for. Payment cleared. Question not asked again." The note was found in archived company files and never clarified.

This joke works through implication and underspecification. The F13 key becomes a symbol of capability beyond normal parameters. It's not an explanation; it's a mystery object that proves Chuck Norris operates with tools that exceed standard specifications. His keyboard is literally non-standard—manufactured outside normal conventions because normal keyboards would be inadequate. This ties into the broader mythology: he doesn't just use standard-issue equipment; everything around him must be customized to accommodate his extraordinary nature.