Week 4 - Information Storage and
Click on the title of each topic below to be
linked to an article about that topic. Each student is responsible for
reading every article.
Paper has been the primary means for record keeping for most of
Johann Gutenberg is famous for inventing the movable type printing
press. The printing press is regarded as one of the greatest advances
in human history, rivaling fire and the wheel.
The Domesday Book is one of the great historical treasure troves of
information. It was compiled almost 1000 years ago.
Regular expressions are a mechanism to select text from a larger body
of text. They are broadly used by programs when searching textual
Read the page linked above and the next page of the article. Although
this article focuses on regular expressions in a web product called
Dreamweaver, regular expressions are widely the same across
Magnetic media became the primary replacement for paper recording.
The hard disk became the dominant mechanism for holding information in
the late 20th century.
Databases are the primary tool to hold information in the present
Relational algebra is the background to most modern database work.
Please read the following portions of this site:
The Relational Algebra
Formal Definition Of Relational Algebra
I will be explaining the last two of these portions in class. Do not
worry if you do not fully understand the reading yet.