Sony, maker of the PlayStation family of game consoles, says the PlayStation 4 has "sold through more than 50 million units to consumers worldwide as of December 6."

That's just a few weeks past the system's third birthday. It was originally released in the US on November 15, 2013. The worldwide sales number includes the original PS4 model, the recently released slim version and the new PlayStation 4 Pro.

Aloysius Low/CNET

"We're truly delighted that the PS4 community continues to flourish since launch three years ago," Andrew House, president and global CEO of Sony Interactive Entertainment, said in a press release. "We will continue to provide the best gaming experiences available ... as we focus on accelerating our business and expanding the PS4 ecosystem."

The company also said it just had "bestThe plant at Willow Run was also beset with labor difficulties, high absentee rates, and rapid employee turnover. The factory was nearly an hour's drive from Detroit, and the imposition of wartime gasoline and tire rationing had made the daily commute difficult. In only one month, Ford had hired 2,900 workers but had lost 3,100.

Also, Henry Ford was cantankerous and rigid in his ways. He was violently anti-union and there were serious labor difficulties, including a massive strike. In addition, Henry Ford refused on principle to hire women. However, he finally relented and did employ "Rosie the Riveters" on his assembly lines, probably more because so many of his potential male workers had been drafted into the military than due to any sudden change of principle on his