[iamstephenliu]

Apple has a bottom bulge on their notebooks whereas Microsoft doesn't: http://www.pcmag.com/media/images/427048-apple-macbook-air-1...

[millstone]

Thanks, I think that explains it. That bulge provides space for ventilation and makes it easier to lift.

[randyrand]

It's mostly to make the laptop look/feel thinner. Has nothing to do with ventilation.

[askvictor]

Indeed, compact cameras have been doing this for decades