History of video game companies
All three of them. Nintendo Sony Microsoft
Posts
List of the notable record labels
All four of them. Sony Music Group Universal Music Group Warner Music Group BMG Rights Management
Better known film studios
All five of them. Universal Pictures Paramount Pictures Warner Bros. Pictures Walt Disney Pictures Columbia Pictures
Major comic book publishers in general
All 12 of them. DC Comics Marvel Comics Archie Comics Titan Comics Dark Horse Comics Viz Media Valiant Comics Image Comics Oni Press IDW Publishing Dynamite Entertainment Boom Studios