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.
The six categories of nutrients. Six Major Nutrient Groups. The body uses nutrients for growth, maintenance, and repair and needs to take in about 40 varieties to function properly. Nutrients can be grouped into six categories: carbohydrate, protein, lipid (fat), water, vitamins, and minerals (see table 8.1). These six nutrients are further classified according to size and energy. Carbohydrate, protein, and fat are macronutrients because they make up the bulk of your diet.