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.
California has several laws banning the use of cell phones (wireless telephones). The first two laws prohibit all drivers from using handheld wireless phones or cell phones and prohibit drivers under 18 from using hands-free cell phones. A third law bans texting while driving.