Tipping Culture: In the U.S., it's customary to tip service workers, and not tipping can be seen as rude.
. Imperial Measurement System: While most of the world uses the metric system, the U.S. still uses the imperial system (inches, feet, miles).
Pharmaceutical Ads: The U.S. is one of the few countries that allow direct-to-consumer pharmaceutical advertising.
Large Food Portions: American food portions are often much larger than those in other countries.
Sales Tax Not Included in Price Tags: Unlike many places where tax is included in the marked price, in the U.S., sales tax is added at the register.
Drinking Age of 21: Most of the world has a lower legal drinking age, typically around 18.
Air Conditioning Everywhere: The U.S. uses air conditioning more widely and at cooler temperatures than many other countries.
Sugary Bread: Even standard bread in the U.S. tends to be sweeter than bread in other countries.