The internet has made many things easier, including looking up businesses and phone numbers. If you don’t feel the need to receive those big phone books on your doorstep anymore, there’s a way you can opt out.
Actually, until 2008 Whitepages was still using the digital equivalent of phone books to store its data. The Whitepages engineering team recently . It turns out that until 2008, the company used multiple RDBMS silos (PostgreSQL 7.4, 8.0, MySQL, Oracle), each silo stored a large flat listing of data. Good old tables.
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ages: 6 to 99 yrs
budget: .00 to .00
prep time: 15 to 60 min
class time: 10 to 20 min
It is possible to shuffle two phone books together in a way that they will withstand thousands of pounds of force to pull them apart. This lesson shows an example with discussion of the general principles.
The site determines which phone books you are eligible for based on your ZIP code, and allows you to choose which you do or do not want to receive.
If you were born in the 1990’s or earlier, you are familiar with phone books. These books listed the phone numbers of the people living in a given area. When you wanted to contact someone you knew the name of, the phone book could help you find his number. Before people switched phones regularly and stopped caring about having a landline, this was important.