You've used it on your phone to connect to other devices. But the Bluetooth symbol is actually combination of Nordic runes. They're the Nordic H and B combined, for the Danish king Harald "Bluetooth" Gormsson.
How much have you ever thought about the symbol on your thumb drive? Well, it's actually modelled after Neptune's Trident, Dreizack. Pretty epic for a memory stick. The circle, square and triangle represent the different type of connections the USB can make.
Alright, maybe you're not exactly finding a map on the back of the Declaration of Independence. But you can tell people that when they look at their penny, they can see that Victor David Brenner hides his initials on Lincoln's shoulder. He was the artist responsible for creating Lincoln's portrait.
You already knew that the Statue of Liberty is a magnificent piece of architecture. But you probably didn't know that there's a secret meaning hiding in her crown. Each of the seven spikes represents one of the seven continents.
This means you're taking a trip to the barbershop, right? It used to mean a little more than that. The red stripe represents blood. Barbers, oddly enough, also used to consider themselves amatuer surgeons. They practiced bloodletting, so you could get a haircut while you were supposedly bleeding out your diseases.
Have you ever driven a friend's car or a rental car, and needed to get gas? Your days of scrambling at the pump to try to see which side the gas tank is on are over. The little arrow indicates which side to fill up on.
Your bread tag tells you the date the loaf of bread expires, sure. And it keeps your bread sealed. But the color of the tag also tells you the day of the week it was shipped out, so you can know just how fresh your bread is.
There's more hidden messages in chocolate. Perhaps they're in cahoots with Toblerone? If you look closely between the "K" and the "I" in the Kiss, you can see they hid another Hershey's Kiss in it. Clever, guys.
Whatever side of the camp you fall on, you probably recognize this symbol as the Apple command logo on your keyboard. It's actually a Swedish road sign. It indicates an interesting landmark is coming up, and it can also copy and paste your text.