Ray

Answer: Along with the Phaneron's answer, using a pseudonym might make it easier for a celebrity to do some things with their real name, such as buying a property or checking into a hotel room alone if they want.

Answer: One of the reasons can be for making a simpler and easier-to-remember name. For example, Andrew Lincoln's real surname is Clutterbuck. Sean Bean changed the spelling of his first name from "Shaun" to look similar to his surname. Another reason is that the Screen Actors Guild does not allow two actors with the exact same stage name, likely to avoid confusion. Michael Keaton's real name is Michael Douglas, which is a name already being used. Michael B. Jordan uses his middle initial because Michael Jordan is technically a member of the Screen Actors Guild for having appeared in Space Jam.

Phaneron ★

Answer: Agree with the other answers, but would add that in Hollywood's earlier days, movie studios typically remade their new talent. Actors were under years-long contracts, and the studios trained them, controlled their publicity and public image, crafted their appearance and style, chose their movie roles, influenced who they publicly dated, and so on. This redo often included changing actors' real names that were considered too long, unsophisticated, difficult to pronounce, too "ethnic," and so on. A good example is Archibald Leach who became "Cary Grant" or Norma Jean Baker who was remade into "Marilyn Monroe." Most actors today use their birth names.

raywest ★

Answer: They're real. TPS stands for test procedure specification. However, I suspect their use in other shows was inspired by "Office Space."

Ray

Answer: This image appears in the music video "Echos" by Johnossi at 0:47. That video is made of clips from the movie "Night of the Living Dead," so I guess it's from that movie. Https://www.youtube.com/watch?v=viN2TsKvJas.

Ray