The diagnosis of a hip fracture is generally made by an X-ray of the hip and femur. Hip fractures occur at the upper end of the thigh bone (femur). In some cases, if the patient falls and complains of hip pain, an incomplete fracture may not be seen on a regular X-ray. In that case, magnetic resonance imaging (MRI) may be recommended. The MRI scan will usually show a hidden fracture.
The 24 in the example above is the number of the postal zone within the city. By the early 1960s a more general system was needed, and on July 1, 1963, non-mandatory ZIP codes were announced for the whole country. Robert Moon, an employee of the post office, is considered the father of the ZIP code.
Modern two-letter abbreviated codes for the states and territories originated when the Post Office introduced ZIP codes in 1963. The purpose was to make room for ZIP codes in the address, rather than to standardize state abbreviations per se. Since 1963, only one state abbreviation has changed.