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.
If you're not a frequent flyer then you might never have used Airplane mode on your phone or tablet; and thanks to the FAA relaxing restrictions on personal electronics it's a feature that may not be around for much longer. There's more to Airplane mode than flight safety, though.