(Reuters) - Wall Street's main indexes slipped at the open on Friday as investors continued to move away from heavily weighted chip and megacap tech stocks, while assessing the impact of a sweeping global tech outage.

The Dow Jones Industrial Average fell 72.67 points, or 0.18%, at the open to 40,592.35. The S&P 500 opened lower by 1.22 points, or 0.02%, at 5,543.37, while the Nasdaq Composite dropped 35.63 points, or 0.20%, to 17,835.59 at the opening bell.

(Reporting by Lisa Mattackal in Bengaluru; Editing by Devika Syamnath)