Possible Clues:

• Creator of a chess champion
• ThinkPad developer
• Developer of the one-named "Jeopardy!" contestant Watson
• Tech giant that sold its PC division to Lenovo
• 'Big Blue' corp.
• Big name in computers
• One of the Dow Jones Industrials
• Maker of the Deep Blue chess computer
• Co. known as "Big Blue"
• Great American computer company