The MacBook Pro was first introduced to the Apple lineup in 2006.

For 2009, the Macbook Pro is available in 3 models: 13-inch, 15-inch, and 17-inch. All laptops in the MacBook Pro lineup are designed with a precision aluminum unibody enclosure.

The MacBook was added to the Apple lineup in 2006 as well.

For 2009, the MacBook is the entry level laptop from Apple with prices starting at $999. The MacBook is the only laptop remaining in the Apple lineup without an aluminum unibody enclosure.

The MacBook Air joined the Apple lineup in 2008. They are marketed by Apple as "the world's thinnest notebook" and are also very light.

The iMac was first introduced in 1998.

For 2009, the iMac features an all-in-one design, a slim anodized aluminum enclosure, and comes in 20-inch and 24-inch configurations.

The Mac Mini was first introduced in 2005.

It is the smallest desktop available from Apple as well as the cheapest (Starting at $599).

The Mac Pro was first introduced in 2006.

For 2009, the Mac Pro line are the most powerful computers offered by Apple. They feature Intel chipsets and Xenon microprocessors.