Wolfram Alpha is a search engine that you can use to compute systematic knowledge immediately. You can put in anything you would like to know and you can compare multiple results with each other. There is no need to know how to search; just type in what you want to know.
The population of San Diego for instance. Or the population of San Diego compared to Los Angeles.
Wolfram Alpha contains 10+ trillion of pieces of data, 50,000+ types of algorithms and models, and linguistic capabilities for 1000+ domains. You are free to try Wolfram but since this is a test version you can expect a heavy load.