Personal Communications Service (PCS) - Any of several types of wireless, voice and/or data communications systems most often used to provide services similar to advanced cellular mobile or paging. The name was designated by the FCC for second generation digital wireless service in the United States, operating in the 1900 MHz frequency range.
www.iec.org/online/tutorials/pcs
Sprint PCS Mobile TV.

http://en.wikipedia.org/wiki/PCS