John F. Kennedy International Airport is one of the busiest airports in the New York City area, The Statue of Liberty, located on Liberty Island, is one of the cities biggest attractions.
There is a major difference between formal and functional regions. Formal regions are huge areas that are characterized by many activities. A functional region is a region that serves other regions, like major cities serving rural areas.
1 Functional specification. 2  The functional specification (usually functional spec or just spec for short) is the formal response to the objectives. 3  It describes all external user and programming interfaces that the product must support.