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Headquartered in Palo Alto , California , Hewlett-Packard ( HP ) is one of the largest computer hardware firms , according to Forbes . It was founded in 1939 by William Hewlett and David Packard and today is consistently recognised as one of the world ’ s most sustainable companies in the sector . In June , the firm released its 2018 sustainability report whereby it pledged to increase recycled content plastic in its personal systems and print hardware and supplies to 30 % by 2025 . AUGUST 2019