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What does "AR" in "AR-15" stand for? VETSAlutes founder Christopher Wipper's tweet about the "assault rifle" sparks a debate online

A majority of comments on the tweet claimed that "AR" stood for "ArmaLite Rifle," named after the company that manufactures it. The rifle is a semi-automatic based on a design that's similar to the ...

What 'OTC' really means – and why it matters more than you think

"OTC stands for 'over the counter,'" says Dr. Mandy Leonard, senior director of pharmacy clinical services at Cleveland ...