Until the spread of OpenType computer fonts starting in 2000–2001, tone letters were not practical for many applications.
The Scarlet Letter | Dear John letter | White-letter Hairstreak | Letter-winged Kite | Letter of Majesty | National Letter of Intent | letter | Franchot Tone | Tone Lōc | Tone | River Tone | Ringback tone | National Association of Letter Carriers | In a Mellow Tone | Chi (letter) | Beta (letter) | Barons' Letter, 1301 | Yasunao Tone | Wolfe Tone | Wild Thing (Tone Lōc song) | Tony! Toni! Tone! | Tone River | tone (linguistics) | ''Tone'' | tone | The Johns Hopkins News-Letter | Strawberry Letter 23 | My Letter to George | Muscle tone | Moe Letter Blues |