Vertebral column | The Scarlet Letter | Column | column | Pioneer Column | Dear John letter | California Column | Nelson's Column | White-letter Hairstreak | Letter-winged Kite | Letter of Majesty | National Letter of Intent | letter | fifth column | The Durutti Column | National Association of Letter Carriers | Fifth Column (band) | Fifth Column | Chi (letter) | Beta (letter) | Barons' Letter, 1301 | vertebral column | The Johns Hopkins News-Letter | the Durutti Column | Strawberry Letter 23 | My Letter to George | Moe Letter Blues | Loudermill letter | letter (message) | Letter from an Unknown Woman |
The term was in use in science fiction fandom no later than 1947, when it was used (spelled "ego boo") in a letter from Rick Sneary published in the letter column of Thrilling Wonder Stories.
Each title had its own letter column (such as "Fantastic Fan-mail"), and also a half-page editorial ("News from the Floor of 64", a reference to the editorial offices at 64 Long Acre in London, an address common to all of the Power Comics), comparable in style and purpose to Marvel's "Bullpen Bulletins".