Complex sentence: The HP ENVY series is a line of high performance laptops manufactured and sold by Hewlett-Packard, which was launched on October 15,2009 as two models, the Envy 13 and the Envy 15.
Split into simpler sentences: The HP ENVY series is a line of laptops manufactured and sold by Hewlett-Packard. HP originally launched the line on October 15,2009 with two high performance models, the Envy 13 and the Envy 15.