Parents often use plug protectors to protect their children from electrical hazards, but experts say they actually do the opposite.

(D-SUBminiature connectors) A family of plugs and sockets widely used in communications and on earlier PCs. For example, the analog VGA monitor interface uses a D-sub 15-pin plug and socket.

The good news is that the power sockets are very familiar to us. The bad news is that we have plugs from all over the world on our devices (as our travel bag tends to be replenished in whatever ...