E1: KYCZ Atlanta on Television: If the TV station is in Atlanta, Georgia, the station call letters must begin with a W. All Atlanta stations must start with W since Atlanta is east of the Mississippi River.
In 1928, the Federal Radio Commission decided on a few rules that remain in effect to this day:
=all radio/TV call names were required to be four letters in length
=stations east of the Mississippi River were required to start their call names with 'W'
= stations west of the Mississippi River were required to start their call names with 'K'
At the end of his checkup Dr. Riley asks Ptolemy if he'd like a "pop" to drink. Two men raised in the South would refer to a carbonated beverage as a "Coke," or maybe "soda," but not "pop" [which is common in the Midwest].