AT&T (T) inflation adjusted price, is calculated in today's money (today's value of money or today's purchasing power of money)
AT&T (T) nominal price, is the recorded price of AT&T (T)
AT&T inflation adjusted price end of month - May 2013

AT&T (T) inflation adjusted chart
AT&T (T) historical chart, 28 years.
AT&T inflation adjusted price end of month May 2013 - historical graph

AT&T inflation adjusted price end of month May 2013 - Logarithmic scale chart