Kensington Computer Products Group is a division brand of ACCO Brands, Inc. Kensington was founded in 1981 with the invention of the System Saver, a combined cooling fan and surge protector designed for use with the Apple II. They currently produce more than 300 different computer accessory products. Kensington is a world leader in branded office products, the group reported annual revenues of nearly $2 billion, and currently markets products in more than 100 countries around the world. Kensington's most popular accessories includes mice, keyboards, laptop case, iPod accessories and other peripheral. The Kensington brand is best known for the Kensington Lock, a lightweight lock system designed to secure notebooks and peripherals. Other products include Duster II canned air.