Technological World
A few examples of what you can ask Wolfram|Alpha about:
get data about a broadcast station
find allocations for a given frequency
translate a string into Morse code
get information about a satellite
compare satellites
get information about a space probe
compare space probes
compute subject magnification
compute hyperfocal distance
encode text as a barcode
generate a barcode corresponding to an ISBN-10
get information about a structure
do computations with properties of structures
get data on a nuclear power station
get information about multiple nuclear reactors
determine the amount of carbon released by a given fuel
calculate the carbon emissions from a road trip