mysteryman on 29 June 2014
The Playstation (1) is commonly known as the PSX, regardless of how technically accurate that may be. Relatively few people know about the PSX (DVR) so the potential for confusion is almost nil by calling the Playstation (1) so.
Particularly considering that those who are aware of the PSX (DVR) generally avoid calling the Playstation (1) so, out of fear of starting the "PSX argument" for the millionth time by overzealous pedants.
