The Dell Latitude is a laptop family from Dell Computers, intended specially for business as well as home use. The Latitude line generally retains identical components throughout its production. This design is intended to simplify maintenance and support tasks for large corporations, allowing components to be easily swapped between models so it seems to be more user friendly.
The Latitude laptops, however, have a magnesium-alloy chassis which is far more rugged and durable. Latitude laptops also tend to have other business and durability-oriented features, such as incredible keyboards, spill-proof keyboards, heavy duty display reinforcements, and matte displays which don't reflect much light, so it wont effect much to the eyes.
Latitude laptops are also differentiated in their feature sets, due to their business focus. For example, they often include security features such as smartcard and contactless smartcard, and TPM security. A lid clasp, DisplayPort video out, and support for legacy standards are all results of the requirements of the business market.