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How the U.S. Postal Service Works
people.howstuffworks.com/usps.htm
The U.S. Postal Service employs about 500,000 people and is responsible for the delivery of mail. Learn more about the United States Postal Service.
How Credit Cards Work
money.howstuffworks.com/personal-finance/debt-management/credit-card.htm
Credit cards have an interesting history. Learn how a credit card works, from the numbering system to how you can get rid of that high interest balance.
How Hereditary Illnesses Work
science.howstuffworks.com/life/genetic/how-hereditary-illnesses-work.htm
Hereditary illnesses can be frightening to new parents, but they are usually rare. Learn about various genetic diseases and their causes.
How Wood Stoves Work
home.howstuffworks.com/home-improvement/heating-and-cooling/wood-stoves.htm
Wood stoves work very well when they are maintained properly. Learn more about how wood stoves work at HowStuffWorks.
Airline Travel for Pets Guide
animals.howstuffworks.com/pets/pet-travel/airline-travel-for-pets.htm
Airline travel for pets can be complicated, especially if you don't have the required materials. Learn all about airline travel for pets at.
5 Reasons Parasites Are Beneficial to Earth
science.howstuffworks.com/environmental/green-science/5-reasons-parasites-beneficial.htm
You probably think all parasites are disgusting little critters, but that's not always the case. Several are actually critical to the planet.
How Data Centers Work
computer.howstuffworks.com/data-centers.htm
Cloud computing, e-mail services and streaming media all have to be handled by interconnected computers. Find out how data centers work.
How John McCain Worked
history.howstuffworks.com/historical-figures/john-mccain.htm
John McCain is a Republican senator and candidate for the presidency in the 2008 election. Learn about John McCain and the political career of John McCain.
10 Trade Secrets We Wish We Knew
money.howstuffworks.com/10-trade-secrets.htm
Trade secrets are often locked away in corporate vaults, making their owners a fortune. Which trade secrets are the stuff of legend?
How Earthworms Work
animals.howstuffworks.com/animal-facts/earthworm.htm
Earthworms aren't just good for fish bait. Read about earthworm anatomy, reproduction and life as an earthworm at HowStuffWorks.