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.
Although airplane mode technically makes a phone legal to use on an aircraft, some airlines request that passengers turn their cellphones off anyway, or a flight attendant who is not familiar with the technology may ask you to turn your phone off.