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.
Airplane Mode, the feature you should use for an iPhone or iPod touch on an airplane while it is flying, is safe for in-flight use because it turns off the devices' ability to send and receive wireless data signals, which have the potential to interfere with the plane's communications systems.