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2. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   Graph of number of coupons, n vs the expected number of trials (i.e., time) needed to collect them all, E (T ) In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests.

3. Mail - Wikipedia

   en.wikipedia.org/wiki/Mail

   The worldwide postal system constituting the individual national postal systems of the world's self-governing states is coordinated by the Universal Postal Union, which among other things sets international postage rates, defines standards for postage stamps and operates the system of international reply coupons.

4. ZIP Code - Wikipedia

   en.wikipedia.org/wiki/ZIP_Code

   A 1974 postage stamp encouraging people to use the ZIP Code on letters and parcels. A ZIP Code (an acronym for Zone Improvement Plan [1]) is a system of postal codes used by the United States Postal Service (USPS).

5. Code of Hammurabi - Wikipedia

   en.wikipedia.org/wiki/Code_of_Hammurabi

   The Code of Hammurabi is a Babylonian legal text composed during 1755–1750 BC. ... both created legal codes to which the Louvre stele has been compared.

6. Black Codes (United States) - Wikipedia

   en.wikipedia.org/wiki/Black_Codes_(United_States)

   The Black Codes, sometimes called the Black Laws, were laws which governed the conduct of African Americans (both free and freedmen).In 1832, James Kent wrote that "in most of the United States, there is a distinction in respect to political privileges, between free white persons and free colored persons of African blood; and in no part of the country do the latter, in point of fact ...

7. AOL Mail

   mail.aol.com/?icid=aol.com-nav

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!