If you've never heard of the Bluetooth MAP profile, I don't blame you. Bluetooth profiles are super, super boring stuff. But stay with me here, because you may be more interested in MAP than you thought.
Do you own a car that is "Bluetooth-enabled"? If your car's model year is somewhere in the neighborhood of the last 3 to 4 years and supports Bluetooth, it probably uses the MAP standard to communicate with your phone.