The amount of water inside the human body is almost half to three-quarters full. Looking at it from an automobile perspective, it is like bringing your vehicle to the gas station. Then taking the nozzle and filling the car a half tank to three-quarters full. However, the difference is the driver must maintain that tank level of gas for the vehicle to run efficiently. That example is somewhat similar to the water inside of the human body. The only difference is most cars can go below a quarter tank and still run smoothly. However, the water within the human body is so unique that humans have no idea how they maintain that level. There may be one out of every hundred people that know the amount of water they drink by the ounce per day.
Cell phone. The most dominant device a human being could ever encounter. In 1973, the cell phone first came on the scene for testing purposes. In 1997, the cell phone became a regular purchase at stores until now. People no longer had to wait until they get home to call someone on the telephone. Other options before cell phone use were using the phone at a business establishment or using the payphone somewhere on the street or nearby subway station. This mobile device became convenient for owners. A phone call and verbal contact made simple at any time and in any place. The cell phone has different names such as cellular phone, mobile phone, hand phone, mobile, or cell for short. The primary features of this mobile include talk, text, receive messages, contacts, and internet access. The cell phone contains other non-communication features. Applications include time clock, alarm, calculator, and a few games.