<?xml version="1.0" encoding="utf-8"?>
<appendix id="ap_glossary">
<title>Glossary</title>
<variablelist>
  <title>A</title>
  <varlistentry id="gt_account">
    <term> 
	Account
    </term>
    <listitem>
      <para>
	An account represents an identity within Claws Mail. As such only 
	one email address is associated with each account. However, the number 
	of accounts you can setup is unlimited.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_action_rules">
    <term>
	Action (filtering/processing rules)
    </term>
    <listitem>
      <para>
	An action is something that is performed on a message when it matches 
	the rule conditions. A typical action is moving the message to a 
	particular folder.  See also <xref linkend="gt_condition_rules" />.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_actions">
    <term>
	Actions 
    </term>
    <listitem>
      <para>
	Actions are user-defined commands that can be applied to a message, or 
	part of a message, using a special syntax. They are presented to the 
	user in a customisable menu.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_addressbook">
    <term>
	Address book
    </term>
    <listitem>
      <para>
	Storage for names, mail addresses and custom user attributes. Also 
	provides access to <xref linkend="gt_ldap" /> servers and <xref 
	linkend="gt_vcard" /> files.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_ascii">
    <term>
	<acronym>ASCII</acronym>
    </term>
    <listitem>
      <para>
	American Standard Code for Information Interchange. A standard <xref 
	linkend="gt_character_encoding" /> using 7 bit. It's defined as an 
	Internet standard in <ulink url="http://www.ietf.org/rfc/rfc20.txt"
	>RFC 20</ulink>.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_attachment">
    <term>
	Attachment
    </term>
    <listitem>
      <para>
	Additional file(s) included with a mail message. Some attachments can 
	be displayed by Claws Mail, others require external programs. 
	<xref linkend="gt_plugins" /> can provide additional functions for 
	attachments.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
<!--
<variablelist>
  <title>B</title>
  <varlistentry id="">
    <term>
    </term>
    <listitem>
      <para>
      </para>
    </listitem>
  </varlistentry>
</variablelist>
-->    
<variablelist>
  <title>C</title>
  <varlistentry id="gt_character_encoding">
    <term>
	Character encoding
    </term>
    <listitem>
      <para>
	A map between written symbols, like letters and other symbols, and the 
	numbers used to represent them inside the computer. The most well-known
	character encoding is probably <xref linkend="gt_ascii" />, but it has 
	been superseded by others, such as <xref linkend="gt_utf8" />.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_compose">
    <term>
	Compose
    </term>
    <listitem>
      <para>
	Create new a message text or a reply to a received mail in the Compose
	window.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_condition_rules">
    <term>
	Condition (filtering/processing rules)
    </term>
    <listitem>
      <para>
	The prerequisites that a mail message must fulfil in order for the 
	rule's action to be executed. See also <xref 
	linkend="gt_action_rules" />.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>D</title>
  <varlistentry id="gt_digital_signature">
    <term>
	Digital signature (<acronym>GPG</acronym>)
    </term>
    <listitem>
      <para>
	A piece of data obtained from merging a message and a cryptographic key
	which ensures message authorship, in a similar way that a hand-written 
	signature does in a document. This piece of data is sent with the m
	essage so the recipient can verify its validity.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>E</title>
  <varlistentry id="gt_encryption">
    <term>
	Encryption (GPG)
    </term>
    <listitem>
      <para>
	Scrambling a message with a cryptographic key so that only the 
	recipient and ownwer of the key password can unscramble it for reading.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>F</title>
  <varlistentry id="gt_face">
    <term>
	Face
    </term>
    <listitem>
      <para>
	A more modern implementation of the <xref linkend="gt_xface" />, it's a
	coloured image (48x48 pixels) included in the message headers.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_filtering_rule">
    <term>
	Filtering rule
    </term>
    <listitem>
      <para>
	A <xref linkend="gt_rule" /> applied to incoming messages. Filtering 
	rules can be also applied manually to the contents of any folder.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_folder">
    <term>
	Folder
    </term>
    <listitem>
      <para>
	A folder is the primary message container. Folders can be local or 
	remote, but they are managed in a uniform way by Claws Mail.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_forward">
    <term>
	Forward
    </term>
    <listitem>
      <para>
	To send a copy of a received mail to another recipient, optionally 
	adding your own message.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
<!--    
<variablelist>
  <title>G</title>
  <varlistentry>
    <term>
    </term>
    <listitem>
      <para>
      </para>
    </listitem>
  </varlistentry>
</variablelist>
-->    
<variablelist>
  <title>H</title>
  <varlistentry id="gt_headers">
    <term>
	Headers
    </term>
    <listitem>
      <para>
	Machine readable lines which form the first part of a mail message. The
	purpose of headers varies; Typical headers are From and To which state 
	the sender and recipient of the message, others are used by the mail 
	system. Some headers are optional and are used to provide additional 
	information, such as <xref linkend="gt_xface" /> or <xref 
	linkend="gt_face" />.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_html">
    <term>
	<acronym>HTML</acronym>
    </term>
    <listitem>
      <para>
	Acronym for Hyper-Text Markup Language. It was the standard language to 
	encode web pages in the beginning of the <xref linkend="gt_www" />. 
	Some mail clients use this language to encode the textual body of mails
	in order to craft special effects to text at the cost of multiplying 
	the message size several times. HTML mail is also widely used by 
	spammers to send <xref linkend="gt_spam" />.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>I</title>
  <varlistentry id="gt_imap">
    <term>
	<acronym>IMAP4</acronym>
    </term>
    <listitem>
      <para>
	Internet Messaging Access Protocol (version 4). A protocol for 
	accessing email on a remote server from a local client. All messages 
	are stored in the remote server.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_immediate_execution">
    <term>
	Immediate execution
    </term>
    <listitem>
      <para>
	When the <quote>Execute immediately when moving or deleting 
	messages</quote> option is used, operations 
	performed on messages, (like deletions or movements), are performed 
	immediately. If the option is turned off, all operations performed on 
	messages by the user are only carried out when the 
	<quote>Execute</quote> button is pressed.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_isp">
    <term>
    	<acronym>ISP</acronym>
    </term>
    <listitem>
      <para>
	Internet Service Provider. A company which provides Internet access to 
	its customers. In the dialup access age these were the big telephony
	companies, with the arrival of broadband access the number of companies 
	and types of services offered has grown exponentially.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
<!-- 
<variablelist>
  <title>J</title>
  <varlistentry id="">
    <term>
    </term>
    <listitem>
      <para>
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>K</title>
  <varlistentry id="">
    <term>
    </term>
    <listitem>
      <para>
      </para>
    </listitem>
  </varlistentry>
</variablelist>
-->    
<variablelist>
  <title>L</title>
  <varlistentry id="gt_ldap"> 
    <term>
	<acronym>LDAP</acronym>
    </term>
    <listitem>
      <para>
	Lightweight Directory Access Protocol. A protocol for accessing 
	information directories such as organisations, individuals, phone 
	numbers, and addresses.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_ldif">
    <term>
	<acronym>LDIF</acronym>
    </term>
    <listitem>
      <para>
	LDAP Data Interchange Format. A text file format widely used for moving
	data between <xref linkend="gt_ldap" /> servers and/or other programs.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_local_mbox_file">
    <term>
	Local mbox file
    </term>
    <listitem>
      <para>
	A local mailbox spool file in <xref linkend="gt_mbox" /> format.      
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_log_window">
    <term>
	Log window
    </term>
    <listitem>
      <para>
	A special window which records protocol operations in detail that are 
	performed by Claws Mail. It's a useful tool for debugging.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>M</title>
  <varlistentry id="gt_mailbox">
    <term>
	Mailbox
    </term>
    <listitem>
      <para>
	The root folder of the folder hierarchy.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_maildir">
    <term>
	Maildir
    </term>
    <listitem>
      <para>
	A mailbox format in which all mail is kept in separate files. 
	Maildir++ is an extension to the maildir format.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_mailinglist">
    <term>
	Mailing-List
    </term>
   <listitem>
      <para>
	Electronic mailing-lists are a special usage of email that allows for 
	widespread distribution of information to many Internet users. They 
	often take the form of discussion lists, like the Claws Mail users'
	list, where a subscriber uses the mailing-list to send messages to all 
	the other subscribers, who may answer in similar fashion.
      </para>
   </listitem>
  </varlistentry>
  <varlistentry id="gt_mark_message">
    <term>
	Mark (message)
    </term>
    <listitem>
      <para>
	A tag that can be set on a message by the user in order to draw 
	attention to the message. Marks are shown in the Mark column of the 
	Message List.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_mbox">
    <term>
	MBox
    </term>
    <listitem>
      <para>
	A mailbox format in which all mail is concatenated and stored in a 
	single file. The mbox format supported by Claws Mail is 
	<literal>mboxrd</literal>.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_message">
    <term>
	Message
    </term>
    <listitem>
      <para>
	A message is the basic piece of information handled by Claws Mail. 
	A message is usually an email message, which is stored in <xref 
	linkend="gt_mh" /> format on disk. Other kinds of messages (and storage
	formats) can be handled through <xref linkend="gt_plugins" />.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_mh">
    <term>
	MH
    </term>
    <listitem>
      <para>
	A mailbox format in which all mail is kept in separate files. This is 
	the default mailbox format used by Claws Mail.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_mime">
    <term>
	<acronym>MIME</acronym>
    </term>
    <listitem>
      <para>
	Multipurpose Internet Mail Extensions. Internet standards for 
	representing binary data in <xref linkend="gt_ascii" /> text format, 
	<xref linkend="gt_headers" /> encoding and <xref 
	linkend="gt_attachment" />s.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>N</title>
  <varlistentry id="gt_nntp">
    <term>
	<acronym>NNTP</acronym>
    </term>
    <listitem>
      <para>
	Network News Transfer Protocol. The protocol used to post, distribute, 
	and retrieve <xref linkend="gt_usenet" /> messages, also called news 
	articles or simply news for short.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_newsgroups">
    <term>
	Newsgroups
    </term>
    <listitem>
      <para>
	A set of hierarchical partitions of <xref linkend="gt_usenet" /> 
	messages on a <xref linkend="gt_news_server" />. The <xref 
	linkend="gt_nntp" /> protocol allows the user to subscribe to one or 
	more newsgroups. New messages posted to the subscribed groups are 
	automatically downloaded on connection.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_news_server">
    <term>
	News server    
    </term>
    <listitem>
      <para>
	Server which provides access to <xref linkend="gt_usenet" /> messages 
	in <xref linkend="gt_newsgroups" /> through the <xref linkend="gt_nntp"
	/> protocol.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
<!--    
<variablelist>
  <title>O</title>
  <varlistentry id="">
    <term>
    </term>
    <listitem>
      <para>
      </para>
    </listitem>
  </varlistentry>
</variablelist>
-->    
<variablelist>
  <title>P</title>
  <varlistentry id="gt_pdf">
    <term>
	<acronym>PDF</acronym>
    </term>
    <listitem>
      <para>
	Portable Document Format. An open binary file format developed by Adobe
	Systems to allow interchanging of printable documents between different
	platforms. Inherits some features from <xref linkend="gt_postscript" />
	but not being a language made it easier to process, especially on 
	desktop computers.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_pgp_inline">
    <term>
	<acronym>PGP</acronym> Inline
    </term>
    <listitem>
      <para>
	Digital signing method which includes the signature data in the message
	body. Currently deprecated in favour of <xref linkend="gt_pgp_mime" />.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_pgp_mime">
    <term>
	<acronym>PGP</acronym> <acronym>MIME</acronym>
    </term>
    <listitem>
      <para>
	Digital signing method which includes the signature data as a separate 
	<xref linkend="gt_mime" /> <xref linkend="gt_attachment" />.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_plugins">
    <term>
	Plugins
    </term>
    <listitem>
      <para>
	External modules which can be loaded and used by Claws Mail to 
	extend its functionality. Technically speaking these modules are
	shared libraries which can register one or several functions to be 
	called by Claws Mail when something 
	<emphasis>interesting</emphasis> is being done.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_pop3">
    <term>
	<acronym>POP3</acronym>
    </term>
    <listitem>
      <para>
	Post Office Protocol (version 3). A protocol for retrieving email from 
	a remote server. Messages can be automatically removed from server 
	after downloading.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_postscript">
    <term>
	<acronym>PostScript</acronym>
    </term>
    <listitem>
      <para>
	Page description language primarily used and understood by printing 
	devices to generate its output. Was developed by Adobe Systems and 
	is now a widely used standard in the printing industry. As it's a
	fully featured interpreted language it requires some processing power
	to deal with.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_privacy_gpg">
    <term>
	Privacy (<acronym>GPG</acronym>)
    </term>
    <listitem>
      <para>
	Privacy provides methods for both signing and encrypting mail messages 
	you send and also for verifying and decrypting signed and encrypted 
	messages that you receive.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_processing_rule">
    <term>
	Processing rule
    </term>
    <listitem>
      <para>
	A <xref linkend="gt_rule" /> or set of rules belonging to a folder 
	which are executed on entering the folder.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>Q</title>
  <varlistentry id="gt_queue">
    <term>
	Queue
    </term>
    <listitem>
      <para>
	Temporary storage for messages which are waiting to be sent, either 
	because they couldn't be sent due a network failure or because the 
	user requested them to be sent later.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_quick_search">
    <term>
	Quick Search
    </term>
    <listitem>
      <para>
	A powerful way to search for messages using almost any criteria that 
	you can think of.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_quotation">
    <term>
	Quotation
    </term>
    <listitem>
      <para>
	When replying to a message the user will often include a quoted section
	of that message to provide the context. The quoted section is shown by 
	the prepending of a common character, usually <quote>&gt;</quote>.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>R</title>
  <varlistentry id="gt_recursive_quick_search">
    <term>
	Recursive (Quick Search)
    </term>
    <listitem>
      <para>
	A recursive <xref linkend="gt_quick_search" /> will also search in all 
	subfolders of the selected folder.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_redirect">
    <term>
	Redirect
    </term>
    <listitem>
      <para>
	To send a copy of a received mail in its original form to another 
	recipient.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_reply">
    <term>
	Reply
    </term>
    <listitem>
      <para>
	Answer to a received message. As verb also the act of answering a 
	message.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_rot13">
    <term>
	ROT-13
    </term>
    <listitem>
      <para>
	Simple <emphasis>encryption</emphasis> method used since Romans age,
	which uses an alphabet rotated thirteen positions to encode each
	letter of the message. Used sometimes to hide funny messages on mails.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_rule">
    <term>
	Rule
    </term>
    <listitem>
      <para>
	Logical structure comprised of one or more conditions (see <xref 
	linkend="gt_condition_rules" />) and one or more associated actions 
	(see <xref linkend="gt_action_rules" />). Rules are used for filtering 
	mail messages.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>S</title>
  <varlistentry id="gt_smtp">
    <term>
	<acronym>SMTP</acronym>
    </term>
    <listitem>
      <para>
	Simple Mail Transfer Protocol. A protocol for sending email to servers.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_smtp_server">
    <term>
	<acronym>SMTP</acronym> server
    </term>
    <listitem>
      <para>
	A server which receives mail messages from other hosts and/or sends 
	mail messages to other hosts using the <xref linkend="gt_smtp" /> 
	protocol.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_source_message">
    <term>
	Source (message)
    </term>
    <listitem>
      <para>
	The full text of a message as it is transmitted over the network. This 
	includes all headers, message body and encoded attachments if present.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_spam">
    <term>
	Spam
    </term>
    <listitem>
      <para>
	Junk mail, unsolicited commercial emails.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_spell_checking">
    <term>
	Spell checking
    </term>
    <listitem>
      <para>
	Automatic verification of spelling while typing or after composition 
	has finished.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_ssl">
    <term>
	<acronym>SSL</acronym>
    </term>
    <listitem>
      <para>
	Secure Sockets Layer. A protocol used to encrypt and protect data sent 
	over a network.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_ssl_certificate">
    <term>
	<acronym>SSL</acronym> certificate
    </term>
    <listitem>
      <para>
	A certificate installed on a secure server that is used for 
	identification.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_starttls">
    <term>
	STARTTLS
    </term>
    <listitem>
      <para>
	STARTTLS (Start Transport Layer Security) is a command used to initiate
	a secure connection between two servers using <xref linkend="gt_ssl" />.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_sticky_quick_search">
    <term>
	Sticky (Quick Search)
    </term>
    <listitem>
      <para>
	When the sticky option is set on <xref linkend="gt_quick_search" /> the
	search terms are not cleared when changing folders.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_synchronisation">
    <term>
	Synchronisation (folder)
    </term>
    <listitem>
      <para>
	Making the contents of a local folder mirror those of an equivalent 
	remote folder in the associated mail server.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>T</title>
  <varlistentry id="gt_tcp">
    <term>
    	<acronym>TCP</acronym>
    </term>
    <listitem>
      <para>
	Transmission Control Protocol. The main protocol used in the Internet.
	Allows media-independent reliable connections between two endpoints 
	and is supported by all modern Operating Systems in use.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_themes">
    <term>
	Themes
    </term>
    <listitem>
      <para>
	Image sets for changing the appearance of buttons, folders and other 
	graphical elements of Claws Mail.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_thread">
    <term>
	Thread (messages)
    </term>
    <listitem>
      <para>
	A set of messages loosely relating to each other. 
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_toolbars">
    <term>
	Toolbars
    </term>
    <listitem>
      <para>
	Sets of buttons arranged horizontally which provide access to all 
	commonly used functions. Toolbars in Claws Mail can be customised.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
  
<variablelist>
  <title>U</title>
  <varlistentry id="gt_uidl">
    <term>
	<acronym>UIDL</acronym>
    </term>
    <listitem>
      <para>
	Unique IDentification Listing. A <xref linkend="gt_pop3" /> command
	which allows single message handling by asigning a unique identifier 
	for each message. 
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_url">
    <term>
	URL
    </term>
    <listitem>
      <para>
	Uniform Resource Locator. A naming scheme for objects (usually files) 
	in a multi-protocol networked environment like current Internet.
	For example, this is the one of the Claws Mail home page: 
	<literal>http://www.claws-mail.org</literal>.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_usenet">
    <term>
	USENET
    </term>
    <listitem>
      <para>
	User's Network. A bulletin board system of discussion groups, often 
	called <xref linkend="gt_newsgroups" />.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_utf8">
    <term>
	<acronym>UTF-8</acronym>    
    </term>
    <listitem>
      <para>
	8-bit Unicode Transformation Format. A variable length character 
	encoding capable of representing any universal character. An Internet 
	standard defined in <ulink url="http://www.ietf.org/rfc/rfc3629.txt"
	>RFC 3629</ulink>.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>V</title>
  <varlistentry id="gt_vcard">
    <term>
	vCard
    </term>
    <listitem>
      <para>
	File format standard for Personal Data Interchange, it can hold 
	information such as address, phone numbers, etc., much like the 
	information usually found in a business card. They are commonly found 
	attached to mail messages.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>W</title>
  <varlistentry id="gt_wrapping">
    <term>
	Wrapping
    </term>
    <listitem>
      <para>
	Restructuring of the message text based on a user-defined maximum 
	number of characters per line. Wrapping ensures that paragraphs are 
	justified, which means that they are aligned to the left and right 
	margins.
      </para>
    </listitem>
  </varlistentry>
  <varlistentry id="gt_www">
    <term>
	<acronym>WWW</acronym>
    </term>
    <listitem>
      <para>
	World Wide Web, the hyperlinked network of web pages across the 
	Internet.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>X</title>
  <varlistentry id="gt_xface">
    <term>
	X-Face
    </term>
    <listitem>
      <para>
	Specially coded black and white image (48x48 pixels) included in the 
	message headers. Capable mailers like Claws Mail and others can 
	decode and show it alongside the message text. Although they are not 
	unique, they can help to quickly identify the message sender. See also 
	<xref linkend="gt_face" />.
      </para>
    </listitem>
  </varlistentry>
</variablelist>
<!--    
<variablelist>
  <title>Y</title>
  <varlistentry id="">
    <term>
    </term>
    <listitem>
      <para>
      </para>
    </listitem>
  </varlistentry>
</variablelist>
    
<variablelist>
  <title>Z</title>
  <varlistentry id="">
    <term>
    </term>
    <listitem>
      <para>
      </para>
    </listitem>
  </varlistentry>
</variablelist>
-->
</appendix>

