In cellular service there are two main competing network technologies: Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA). Cellular carriers including at&t wireless, Verizon, Sprint-Nextel, T-Mobile and smaller carriers use one or the other.
The smallest bone in the human body is the stirrup bone, the stapes, one of the 3 bones that make up your middle ear; measuring 2-3 millimeters.
The pituitary gland is the smallest endocrine gland in the human body.