Copyright is an exclusive right given to creators to control the reproduction, distribution, and adaptation of their work. Copyleft is a licensing approach that seeks to override copyright and allow owners to freely license their works. Creative Commons licenses provide flexible options for authors to specify constraints, such as requiring attribution or prohibiting commercial use. The most common Creative Commons license allows full rights to the owner, including deciding distribution and charging fees.

1. Arlet Rua
Roxana Arroyo

2. • This is the most popular license, and
unfortunately it's the most used one.
It allows full rights to the owner of
the work (that may not be the very
author), and he's the only one that
may decide what to do with it,
whether to charge for it or not,
besides having to request permission
for usage. Distribution is only
restricted to the owner of the
creation, that means the license only
allows possession but not
distribution. This is usually applied to
books, music, movies and software,
as an example.

3. This license and Creative Commons
license are pretty the same, this is
because copyleft is the mother
license for Creative Commons. This is
quite the opposite of Copyright.
Works are not restricted by any
constraint: they can be modified,
shared with other users and content
can be copied. Modification of
original work may even be
commercial.

4. Copyright gives the owner an
exclusive right to reproduce, reuse
or republish the copyright material.
A school of thought known as the open
source movement which seeks to override
copyright and allow the copyright owner to
license his or her works. This form of
licensing is known as Copyleft and is
commonly used in relation to software and
open source code.

5. This license is son of Copyleft and is
gaining more and more notoriety firstly
because of blogs. Difference between these
licenses is that Creative Commons is more
flexible than its father: level of protection
can be set directly by the author of the
work. There are different possibilities to
establish what kind of constraints to
attribute to a Creative Commons License,
but all of them share one, that is
acknowledging the author of the work. This
is default obligation for the user. All other
constraints are specified by the author.

7. • Wikipedia, as the name suggests, uses a
"wiki" system to build out its encyclopedia.
What exactly is a wiki? The online
dictionary Webopedia defines a wiki as "a
collaborative Web site the perpetual
collective work of many authors. A wiki
allows anyone to edit, delete or modify
content that has been placed on the Web
site including the work of previous
authors." Since Wikipedia is open to the
public, anyone with an Internet connection
is free to anonymously contribute to the
online encyclopedia by either adding a new
article or editing a previous author's work.

8. • Wikipedia is largely controlled by a
limited number of administrators who
have the power to purge articles and
ban editors. Like editors, these
administrators remain anonymous and
do not have to prove any expertise to
establish their authority.
• The first wiki Web site was created in
1995 by Ward Cunningham to promote
a freer exchange of information
between computer programmers. He
got the word “wiki” from the Hawaiian
word for “quick” and called his Web
site “WikiWikiWeb.”
• Wikipedia itself warns readers that "We
do not expect you to trust us. Some
articles are of the highest quality but
others are admittedly complete
rubbish.
• Although Wikipedia is the most well
known wiki Web site, it is hardly the
only one.
• The corporate world has taken note
of the usefulness of wiki technology
and has begun to incorporate it
internally. Companies ranging from
Nokia to IBM have set up their own
internal wikis to make information
flow more efficiently.
• Wikipedia is a nonprofit that does
not accept advertising and relies on
donations to stay alive.