Olive Garden has a "tablet" for two waiting for you.The Italian restaurant chain says it's installing computer tablets at all of its U.S. locations so customers can order and pay by touch screen.Tablets have made appearances in airports, where travelers can have food delivered to where they sit, but are still limited in the traditional restaurant scene.The chain, owned by Florida's Darden Restaurants Inc., says locations using the devices have experienced faster dining times and increased tip percentages for wait staff.Olive Garden anticipates having the 7-inch tablets in all of its more than 800 U.S. restaurants before year's end.