PlayStation 9

PS9 was a gaming console popular in the year 2020. When Sally Morgan found Victorian-style dolls in what seemed to be a nursery in Blue Fire House, Rachel McMahon remarked sarcastically, "No PS9s here!" (AUDIO: House of Blue Fire)

Behind the scenes
PS9 is obviously intended to be a future iteration of the Playstation video game console, meaning the console's full name is likely "Playstation 9". At the time the story was made, the was the concurrent Playstation console.

In reality, the was the concurrent version of the console by 2020, with the  being scheduled for release at the end of that year.