Abnormal posturing is different from bad posture or slouching.. Instead, it involves holding a body position, or moving one or more parts of the body in a certain way. Abnormal posturing may be a sign of certain injuries to the brain or spinal cord.
Follow @TIME. 1963 was a momentous year in America: President John F. Kennedy was assassinated, Martin Luther King Jr. delivered his âI Have a Dreamâ speech at the March on Washington and, somewhat less heralded by all but the most fervent postal historians, the ZIP code was introduced.
ZIP Code. 1  During World War II, thousands of experienced postal employees left to serve with the military. To offset the loss, in May 1943 the Post Office Department began a zoning address system in 124 of the largest cities. 2  Twenty years later, the Department implemented an even farther reaching plan, the Zoning Improvement Plan (ZIP) Code. The social correspondence of the 19th century had given way, gradually then explosively, to business mail. By 1963, 80 percent of all mail in the United States was business mail.