XBO meaning in General ?

The Xbox 360 video game console has appeared in various retail configurations during its life-cycle. At its launch, the Xbox 360 was available in two retail configurations: the morning "Xbox 360" package (unofficially known as the 20 GB Pro or Premium), priced at US$399.99 or £279.99, and the "Xbox 360 Core," priced at US$299.99 and £209.99. The original shipment of Xbox 360s included a cut-down version of the Media Remote as a promotion. The Elite package was launched later at a retail price of US$479.99. The "Xbox 360 Core" was replaced by the "Xbox 360 Arcade" in October 2007 and a 60 GB version of the Xbox 360 Pro was released on August 1, 2008. The Pro package was discontinued and marked down to US$249.99 on August 28, 2009 to be sold until stock ran out, while the Elite was also marked down in price to US$299.99.

In June 2010, Microsoft announced a new, redesigned model and the discontinuation of the Elite and Arcade models.