Amazon utilizes robust customer tracking and data warehousing capabilities to provide personalized recommendations and reviews to customers. Customer tracking is a strong suit that allows Amazon to provide useful features to customers like recommendations based on purchase history. Amazon also divides its data warehouse into three key functions: query, historical data, and extract, transform, and load to integrate data sources. Customer tracking and data integration allow Amazon to know customers very well and enhance their shopping experience.

1. Section A
・1, Key Words
-multi-leveled e-commerce
-security
-Large retailers
-community
-Amazon Services

2. 2, 3 sentences from the article that are
very important for understanding the
concept described in the article.
● Know your customer very, very well. Customer
tracking is an Amazon stronghold. If you let the
Web site stick a cookie on your hard drive,you'll
find yourself on the receiving end of all sorts of
useful features that make your shopping
experience pretty cool, like recommendations
based on past purchases and lists of reviews
and guides written by users who purchased the
products you're looking at.

3. ・The data warehouse is roughly divided into three
functions: query, historical data and ETL (extract,
transform, and load -- a primary database function
that pulls data from one source and integrates it
into another).
・The level of customer tracking at
Amazon.com is another best-of-breed
system.

4. 3,Why are these sentences
important?
・This first sentences is explaining to Amazon's
history and basics.The sites is very big sites.
Know its is has sites serving seven
countries.There sells lots and lots of stuff . User
can shopping to various kind of goodsat
home.Various kind of goods is beauty supplies,
clothing, jewelry, gourmet food, sporting goods,
pet supplies, books, CDs, DVDs, computers,
furniture, toys, garden supplies.

5. ・Seconds sentences is writint to about
Amazon Technology.Amazon is having
very large servers.The server is the
world's three largest Linux
databases.Amazon's security is
strong.SSL protocol which is using to
Amazon employs the Netscape Secure
Commerce Server improve
security.AThe security is a good security
against a hacker snd cracker.

6. ・Final sentences is writing to Amazon
tools, marketing and
community.Amazon's marketing is the
least expensive .It is structure is a
lesson in cost-efficiency and brilliant
self-promotion.Amazon's sites
recommend to shopping goods which
user like it.