Is there a PostgresQL equivalent to the DESCRIBE keyword???

Hey All,

I'm trying to display the schema to various tables.  In most other
databases, you can use the DESCRIBE keyword or the SHOW keyword (I believe
this is a SQL99 keyword).  Is there an equivalent in PostgresQL?

Also, does PostgresQL have an equivalent to the following:

SHOW CREATE TABLE table_name

Thanks for any help.

Peter