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.
Your body requires six essential nutrients: fat, proteins, carbohydrates, vitamins, minerals and water; however, it can't produce these nutrients independently, so you have to consume them through your diet. Nutrient Classifications. The macronutrients -- fats, proteins and carbs -- provide the majority of our energy. Vitamins and minerals, which include iron and calcium, are considered micronutrients because we require them in much smaller quantities. A varied diet is the best way to get all essential nutrients.