If you're looking to solve the the common problem of needing to buy some laptops for the army with which you're planning to invade both the Serengeti and Antarctic and need systems that can take a bit of torture. Luckily for you, several of Lenovo's ThinkPad range have been certified by the US military for just such treatment.
Okay, so such thorough testing is outside the range of how most of us will ever use our laptops - until the air conditioning breaks in the middle of summer at least - but there's no such thing as being too prepared. Just check out the conditions in which you could use a ThinkPad X200, X301, X200s, X200 Tablet, T400, T500, R400 or SL300 should you so desire:
Low Pressure - Tests operation at 15,000 feet
Humidity - Cycles 95 percent humidity through the environment
Vibration (operational and non-operational) - Jostles and jolts the laptops to make sure they can withstand shocks
High Temperature - Simulates high heat conditions by baking the laptop up to 140°F (60°C)
Low Temperature - Tests operation at -4°F (-20°C)
Temperature Shock - Fluctuates between -4 and up to 140°F to test operation
Dust - Blows dust for an extended amount of time
Not exactly child's play, I'm sure you'll agree. And that's only the testing for semi-rugged conditions! I'll feel a lot safer taking my ThinkPad into the garden at any rate. Or at least I would if I had a ThinkPad - but you get the point.