Socioeconomic Data
A few examples of what you can ask Wolfram|Alpha about:
get demographic information about a country
do computations with demographic statistics
do computations with city properties
get socioeconomic data for a ZIP code
get economic data for the US
get salary data for a given occupation
get unemployment data for a US state
get energy price data
get home value data
get statistics on a specified type of crime
determine facts about military forces
get information about a religion
compare health indicators of countries