CDMA (Code Division Multiple Access) and GSM (Global System for Mobiles) are shorthand for the two major radio systems used in cell phones. Both acronyms tend to group together a bunch of technologies run by the same entities. In this story, I'll try to explain who uses which technology and what the real differences are.
Dairy. Dairy products provide nutrients that are critical for bone health, including calcium, potassium and vitamin D. Dairy is also a source of protein. The benefit dairy provides for bones makes consumption especially critical for growing children, whose bone mass is developing.
All these questions, and more, are answered here in the Dairy section of EatByDate. Milk, cheese, and yogurt are nutrient-rich foods abundant in calcium, potassium, vitamins, and protein essential for human growth and development. They also happen to be extremely versatile, forming the basis for many a sauce, spread, cream, dessert, dip, and so much more.