SAN FRANCISCO (Bloomberg) - Hewlett-Packard Co., the world's largest personal-computer maker, revamped its consumer notebooks to meet growing demand for faster, thinner and lighter machines.

The new ProBook 5310m, which starts at $699, and the Pavilion DM3, starting at $549, measure less than one inch thick, Hewlett-Packard said yesterday in a statement. The company also added two new versions of its ultrathin Envy line, with prices starting at $1,699.

Demand for thin and light PCs will rise faster than the total notebook market in the US over the next five years, Hewlett-Packard said, citing research from Framingham, Massachusetts-based IDC. In addition to unveiling ProBook, Pavilion and Envy models, the company updated its Mini netbooks - scaled-down laptops starting at $399. Notebooks accounted for 17 percent of Hewlett-Packard's sales last quarter.

"If there's one message that explains our focus, it's that less is more," said Stacy Wolff, head of PC notebook design for Hewlett-Packard. Notebooks have become a status symbol for users, who are looking for high-quality materials and simple designs, he said.

The new ProBook and Pavilion models will be available in the US on October 22, when Microsoft Corp. ships its latest Windows operating system software. The ProBook includes an Intel Corp. processor and weighs 3.7 pounds (1.7 kilograms). It has a 13.3-inch (34-centimeter) screen and a battery that lasts as long as 7 hours.

The Pavilion weighs 4.2 pounds, with up to 10 hours of battery life. Customers will be able to choose between processors from Intel and Advanced Micro Devices Inc.

The Envy 15 is the most powerful of the new models. The computer, coming out on October 18, will include Intel's new Core i7 processor. It weighs 5.18 pounds, with a 15-inch screen.

The company also unveiled a lower-priced version of its all-in-one desktop PC. That model, with an 18.5-inch display, will start at $599. Hewlett-Packard already sells 22-inch and 25.5-inch all-in-one desktops, starting at $999.