Fn key: Modifier key, Keyboard (computing), F lock, layout, Laptop, Dell Inspiron, Num Apple

Control key: Computing, Modifier key, Shift Alt Delete, Keyboard (computing), Caps lock,...

AltGr key: Modifier key, Keyboard (computing), layout, Capital letter, ß, Sun Microsystems,...

Dead key: Modifier key, Typewriter, Keyboard (computing), Grapheme, Diacritic, Letter (alphabet), Grave...