The MacBook Air is a Macintosh notebook computer designed by Apple. It is positioned as the ultraportable in Apple's MacBook Family and was introduced at the Macworld Conference & Expo on January 15, 2008. It has been revised twice since the original release.

During its introduction, Apple described it as the "world's thinnest notebook". Since then, Dell has challenged that claim with the Dell Adamo. Several features were sacrified to reduce the computer's size and weight.

It is Apple's first notebook since the PowerBook 2400c without a built-in removable media drive. It also omits a FireWire port, ethernet port, line-in, media card slots and a Kensington Security Slot. The battery is internal and not user removable, and the RAM is soldered onto the motherboard.

A single speaker is included for mono sound.

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