June 10 (Bloomberg) -- Hewlett-Packard Co., the world's largest personal-computer maker, updated its desktop and notebook computers, adding an ultra-thin portable to rival Apple Inc.'s MacBook Air.

The Voodoo Envy, less than an inch (2.5 centimeters) thick and weighing about 3.4 pounds (1.5 kilograms), was introduced at an event in Berlin today, Hewlett-Packard said in a statement. The company also added a new version of a touch-screen desktop PC and 16 notebooks for consumers and businesses.

Hewlett-Packard retook the PC lead from Dell Inc. two years ago by wooing consumers through retailers and making its portable designs more appealing. Dell has mimicked that strategy, offering machines with new designs and expanding beyond its direct-sales model. Dell now sells through 13,000 stores, while Hewlett-Packard works with more than 70,000.

``Dell has kind of pinned their success on trying to copy what we do,'' Todd Bradley, head of Hewlett-Packard's PC unit, said in an interview. ``We don't follow -- we lead.''

The Envy, which starts at about $2,100, is 0.7 inches thick and has a 13.3-inch display. The 3-pound MacBook Air, billed by Apple Chief Executive Officer Steve Jobs as the world's thinnest notebook, has a sloping design that is 0.16 inches at its thinnest point and widens to 0.76-inches. Unlike the Air, the Envy has a user-replaceable battery.

Palo Alto, California-based Hewlett-Packard also unveiled the EliteBook notebook for business users, which has a heavy- duty, scratch-resistant case. An update of the 17-month-old HP TouchSmart, an all-in-one PC that combines a 22-inch widescreen display and computer into a single case, has new software for navigating by touch.

PC Sales

PC sales totaled $10.1 billion and accounted for about a third of Hewlett-Packard's revenue last quarter. The company had 19.1 percent of the worldwide PC market in the first three months of 2008, while Round Rock, Texas-based Dell accounted for 15.7 percent, according to researcher IDC in Framingham, Massachusetts.

Hewlett-Packard, also the world's biggest printer maker, fell 6 cents to $47.57 at 4 p.m. in New York Stock Exchange composite trading. The stock has fallen 5.8 percent this year.

To contact the reporter on this story: Connie Guglielmo in San Francisco at cguglielmo1@bloomberg.net.

Last Updated: June 10, 2008 16:09 EDT