    • Share   • Read Later James A. Guilliam / Getty Images  The
world’s best-selling cookies are celebrating their 100th
birthday. On March 6, 1912, the National Biscuit Company (also
known as Nabisco) sold its first Oreo sandwich cookies to a
Hoboken grocer. Billions of dollars and many obscure varieties
later, today Oreos remain an iconic snack-time staple. We twist
them, we dunk them, we love them. But just how much do we know
about them?  (MORE: The Oreo Cookie’s Emboss: A Design Shrouded
in Mystery)  The name is a mystery. No one can confirm the true
origin of the word “Oreo.” Some believe it was derived from the
French word for gold, “or,” because its original packaging was
mostly gold. Others have offered the hypothesis that it comes
from the Greek word for mountain, perhaps because the test
version of the cookie had a hill-like shape.  71% to 29% is the
cookie-to-creme ratio of an original Oreo cookie.  The Oreo
became kosher in 1998. All Oreo packing now bears a symbol, just
above the package weight