Apple Chief Steve Jobs unveiled the company's latest addition to its Mac family on Tuesday with the new MacBook Air Computer, calling it the world's thinnest notebook.

Speaking at the Macworld Expo in San Francisco, Jobs confirmed persistent rumors of an ultra-thin and lightweight laptop. The computer has an Intel Corp. processor that's smaller than the chips in other systems, weighs 3 pounds and has 2 Gigabytes of memory, he said.

We're talking thin here, Jobs said, noting its size of just 0.76 inches at its thicket point and .16 inches at its thinnest.

The Air computer has a 13.3-inch display, offers a full-sized and back- lit keyboard and an 80-gigabyte hard drive. No built-in optical drive, so it won't play DVDs or CDs directly, but Apple is offering one as an accessory. It also has a built-in camera for videoconferencing and a trackpad with multi-touch gesture support, letting users pinch, rotate and swipe.

The new notebook is powered by a 1.6 GHz or 1.8 GHz Intel Core 2 Duo processor with 4MB L2 cache, and it includes as standard features 2GB of memory, an 80GB 1.8-inch hard drive, and the latest 802.11n Wi-Fi technology and Bluetooth 2.1.

The company also said MacBook Air battery is their thinnest ever and users can access the web wirelessly up to five hours.

Apple is relying on new devices and services to attract more consumers as it expands into new entertainment and computer markets. The Macworld Expo offers a glimpse into its biggest products for the year. Last year, the most hyped product was the iPhone.

See full coverage from Macworld 2008

Apple shares fell $11.35, or 6.4 percent, to $167.36 at 2.24 p.m. New York time in Nasdaq Stock Market trading.