William Grant Bill Moggridge invented the first laptop computer, the GRiD Compass, in 1979. While working for Grid Systems Corporation, Moggridge designed the Compass, which featured a clamshell design and could run on batteries. It helped popularize the laptop form factor despite its high price of $8,000-10,000. The Compass paved the way for more affordable and portable personal computers. Moggridge's invention transformed mobile computing and how people work and learn on the go.