Avoid using the terms 'installation', 'site', or 'instance' when referring

to the thing you get from running initdb.  That's called a database cluster
(per SQL).

doc/src/sgml/arch-pg.sgml

@@ -34,9 +34,9 @@
 <Para>
      A single  <Application>postmaster</Application>  manages  a  given  collection  of
      databases  on  a  single  host.   Such  a collection of
-     databases is called an installation or site.   Frontend
+     databases is called a cluster (of databases).   Frontend
      applications  that  wish  to  access  a  given database
-     within an installation make calls to the   library.
+     within a cluster make calls to the   library.
      The library sends user requests over the network to the
      <Application>postmaster</Application>
 (<XRef LinkEnd="PGARCH-CONNECTIONS" EndTerm="PGARCH-CONNECTIONS">(a)), 

doc/src/sgml/arch.sgml

@@ -35,9 +35,9 @@
 <Para>
      A single  <Application>postmaster</Application>  manages  a  given  collection  of
      databases  on  a  single  host.   Such  a collection of
-     databases is called an installation or site.   Frontend
+     databases is called a cluster (of databases).   Frontend
      applications  that  wish  to  access  a  given database
-     within an installation make calls to the   library.
+     within a cluster make calls to the   library.
      The library sends user requests over the network to the
      <Application>postmaster</Application> (<XRef LinkEnd="ARCH-CLIENTSERVER" EndTerm="ARCH-CLIENTSERVER">),
      which in turn  starts  a  new backend  server  process

doc/src/sgml/notation.sgml

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+$Header: /cvsroot/pgsql/doc/src/sgml/notation.sgml,v 1.12 2000/12/22 19:31:56 petere Exp $
 -->
 
 <sect1 id="terminology">
  <title>Terminology</title>
 
- <para>
-  In the following documentation,
-  <firstterm>site</firstterm>
-  may be interpreted as the host machine on which 
-  <Productname>Postgres</Productname> is installed.
-  Since it is possible to install more than one set of 
-  <Productname>Postgres</Productname>
-  databases on a single host, this term more precisely denotes any
-  particular set of installed 
-  <Productname>Postgres</Productname> binaries and databases.
- </para>
-
  <para>
   The 
   <Productname>Postgres</Productname> <firstterm>superuser</firstterm>

doc/src/sgml/query.sgml

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-$Header: /cvsroot/pgsql/doc/src/sgml/query.sgml,v 1.15 2000/12/22 18:57:50 petere Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/query.sgml,v 1.16 2000/12/22 19:31:56 petere Exp $
 -->
 
  <chapter id="query">
@@ -88,8 +88,8 @@ mydb=> \i basics.sql
     are <firstterm>attributes</firstterm>.
     As  previously  discussed,  classes  are  grouped  into
     databases,  and  a collection of databases managed by a
-    single <application>postmaster</application> process constitutes  an  installation
-    or site.
+    single <application>postmaster</application> process constitutes  a
+    database cluster.
    </para>
   </sect1>