100 Million PS2s Shipped
1up.com reports on a Sony release stating they've shipped 100 Million PS2 consoles. From the article: "PSOne took more than nine years to reach the same milestone Sony's achieved with PlayStation 2 in a little more than five. Sony says global shipments of PlayStation 2 break down to 40.65 million units in North America, 37.14 million in Europe and 22.22 million in all of Asia. The end result is Sony having a PlayStation brand that's moved roughly 1.86 billion units of hardware in a little over a decade, with plenty of time for PlayStation 2 to keep growing as the company makes the shift into next-generation in the coming year. "
PS2s, PS1s, PSPs. You don't add an apostrophe to anything to make it plural.