Low Voltage Cables are used to supply power for use up to 1.1 kV.

A floppy disk contains both circular tracks and sectors in it.

The first computers used vacuum tubes for circuitry and magnetic drums for memory, and were often enormous, taking up entire rooms.

The purpose of safety stock is to control the likelihood of a stockout due to the variability of demand during lead time. Stockouts contribute to the direct loss of any type of business.

All proteins, carbohydrates and fats are macronutrients that we need to make living. They contribute to 90% of the dry weight of our diet. 

From the given options, Excess carbohydrates and fats are stored; excess proteins are not.

Secretion of hormones for calcium regulation in blood and bones is not a function of a bone.