>>712616548 (OP)Playstation is the official name.
PS1 was the official abbreviation when the PS2 existed
PSone was a specific model of PS1.
PSX was retarded journos trying to save a few keystrokes by using the pre release code name before they knew what it was actually called
When the name was announced they should have stopped using the code name, but didn't because they are retarded journos.