The exact number on an EGT gauge is usually meaningless: The Alcor EGT gauge you'll find on many aircraft has no temperature markings on it - just 25-degree divisions, and a yellow reference pointer which the pilot sets to the maximum observed EGT: The notable exception to this is turbocharged engines which have a Turbine Inlet Temperature (TIT) ...
The Keystone State. Pennsylvania's nickname is The Keystone State because it was the middle colony of the original 13 colonies and because Pennsylvania has held a key position in the economic, social, and political development of the United States.
PA stands for Pennsylvania. Here is a link to acronym finder that will give you a list of all State abbreviations, capitals and a link to their website as well. I don't know your pa. public address system, or Pennsylvania (post office code using first letter & last letter of state name).