Want to try your hand at flying a quadcopter, but aren’t ready for a pro model? These are the best affordable and easy-to-fly drones we've tested. Images, and the devices that capture them, are my ...

Diversify your investment across multiple stocks to reduce risk. Use available funds to buy exact or fractional shares, depending on the broker. Consider using commission-free brokers to maximize ...

Coq'Art is the familiar name for the first book on the Coq proof assistant and its underlying theory, the Calculus of Inductive Constructions. This project contains the Coq sources of all examples and ...