Ideal computer for Archaeology is iPad
The above photo gallery shows that Apple has put together to plug the power of the iPad as used by archaeologists at Pompeii. Well by looking at the shiny iPads on their smart wooden desks in the Apple Store, that using one inside a muddy pit would be a terrible idea. But it is not because it serve them as excellent outdoor computers. The lack of moving parts means fewer chances for dirt to get inside, and the lack of keyboard means you can use the muckiest of fingers and still get your data entered without a problem.
There is also an additional interest like the selection of applications used by real archaeologists in the field. FM Touch for mobile Filemaker databases, iDraw and OmniGraffle for sketching out discoveries and charts