Web & Internet
A few examples of what you can ask Wolfram|Alpha about:
IP Lookup
get information about an IP address
calculate subnet masks
Top-level Internet Domains
get information about a top-level internet domain
get a list of the top-level internet domains
find information about a property of a top-level internet domain
Port Numbering
find a port assignment
find a port assignment for a specific protocol
look up your IP address and estimate your location