You probably remember the exact moment you were handed the key to your first car. Suddenly, your favorite haunts felt more ...

Car, home, mailbox, work, and like a half-dozen keys to Dad's house. Theoretically I only need two keys for Dad's house, but for some reason the locks and the keys have worn down in odd ways so ...

Unlike the venerable "purse hung from a car's choke knob causes damage to the automobile" legend, there is a bit of something to the caution against having too many keys on one's key fob.

Different sizes of keyboards have varying octaves, depending on how many total keys they have: 49 keys with four octaves; 61 keys with five octaves; 76 keys with six and a half octaves ...

I also have lockpicks in my work bag, because that's not enough keys. Too many! I need to remove some. I can't even remember what one or two of them are for. Fob for the 124. Key for the dumpster ...

One of Cristofori's three surviving pianos is at the Metropolitan Museum of Art in New York, and it has only 54 keys. How many octaves are on a piano? There are seven octaves on a standard piano ...