Types of abstracts. There are two types of abstracts: descriptive and informative. They have different aims, so as a consequence they have different components and styles. There is also a third type called critical, but it is rarely used.
Samsung Galaxy Note 7 smartphone has been banned from all aircraft in the United States. The US Transportation Department and other agencies have banned passengers from carrying on the devices or putting them inside checked baggage during flights.
But the move to keep cell phones off planes has Congressional allies. The House just passed the Halting Airplane Noise to Give Us Peace Act, or HANG UP, which would maintain the ban on cell phone use during flights. But again, people love their WiFi, even if it does cost as much as $12.95 for a three hour flight.