Ms. Matthews,
PostgreSQL, like other "real" database systems (such as Oracle, SQL Server,
and DB2) does not include a GUI interface as a part of the database.
Instead, there are several different GUIs which you can use, depending on
your operating system, needs, and programming language:
http://techdocs.postgresql.org/guides/GUITools
Also, you will want to join the pgsql-novice mailing list to ask additional
questions you might have regarding getting up & running on PostgreSQL:
send e-mail to: majordomo@postgresql.org
subject: <blank>
message: subscribe pgsql-novice
--
Josh Berkus
Aglio Database Solutions
San Francisco