Soda, Soda Pop, Pop, and Coke
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Hookay, I have read the comments up to my own (#259) so before I refresh and find 259 more....
Growing up here in NE Oklahoma, being the cosmopolitan melting-pot that it is, I'd heard soda, soda pop, pop, and occasionally the South-influenced generic "coke." The map someone linked to (first one not second one I didn't see) confirms Oklahoma's mix.
And of course now I want a Vernor's... or an RC or Dr Pepper from circa 1960 before they changed the recipes.
* pours another snifter of brandy *