diff -r 5c381cf64b03 -r 75ccf608a16e data/dictionary.xml
--- a/data/dictionary.xml	Sun Aug 18 17:43:14 2013 +0200
+++ b/data/dictionary.xml	Sun Aug 18 18:15:11 2013 +0200
@@ -1273,7 +1273,43 @@
 		<term abbreviation="" completeForm="hack" language="en"/>
 		<term abbreviation="" completeForm="hacking" language="en"/>
 		<term abbreviation="" completeForm="hacker" language="en"/>
-		<explanation language="en"><text></text></explanation>
+		<explanation language="en">
+			<text>
+				hacker is an interrogative person interested in internal principles of things;
+				often it is a software developer or a system administrator but hacking is also possible outside the digital world;
+				hacking is the activity of these people – usually
+					improving a software by adding new features
+					or discovering secrets in existing software or hardware systems
+					or running extraordinary configurations or combinations of components;
+				hack is the product of their work – e.g. improved computer program or piece of hardware;
+				<!-- hack can mean also the insctructions how to do it; -->
+				don't confuse with „cracker“
+			</text>
+			<!--
+				RMS - https://www.gnu.org/philosophy/rms-hack.html
+				„someone who enjoys playful cleverness, especially in programming but other media are also possible“
+				
+				ESR - http://www.catb.org/~esr/jargon/html/H/hacker.html
+				[originally, someone who makes furniture with an axe] 
+				1. A person who enjoys exploring the details of programmable systems and how to stretch their capabilities, as opposed to most users, who prefer to learn only the minimum necessary. RFC1392, the Internet Users' Glossary, usefully amplifies this as: A person who delights in having an intimate understanding of the internal workings of a system, computers and computer networks in particular.
+				2. One who programs enthusiastically (even obsessively) or who enjoys programming rather than just theorizing about programming. 
+				3. A person capable of appreciating hack value. 
+				4. A person who is good at programming quickly. 
+				5. An expert at a particular program, or one who frequently does work using it or on it; as in ‘a Unix hacker’. (Definitions 1 through 5 are correlated, and people who fit them congregate.) 
+				6. An expert or enthusiast of any kind. One might be an astronomy hacker, for example. 
+				7. One who enjoys the intellectual challenge of creatively overcoming or circumventing limitations. 
+				8. [deprecated] A malicious meddler who tries to discover sensitive information by poking around. Hence password hacker, network hacker. The correct term for this sense is cracker.
+				The term ‘hacker’ also tends to connote membership in the global community defined by the net (see the network. For discussion of some of the basics of this culture, see the How To Become A Hacker FAQ. It also implies that the person described is seen to subscribe to some version of the hacker ethic (see hacker ethic).
+				It is better to be described as a hacker by others than to describe oneself that way. Hackers consider themselves something of an elite (a meritocracy based on ability), though one to which new members are gladly welcome. There is thus a certain ego satisfaction to be had in identifying yourself as a hacker (but if you claim to be one and are not, you'll quickly be labeled bogus). See also geek, wannabee.
+				This term seems to have been first adopted as a badge in the 1960s by the hacker culture surrounding TMRC and the MIT AI Lab. We have a report that it was used in a sense close to this entry's by teenage radio hams and electronics tinkerers in the mid-1950s.
+				
+				RFC 1392 - https://tools.ietf.org/html/rfc1392
+				A person who delights in having an intimate understanding of the
+				internal workings of a system, computers and computer networks in
+				particular.  The term is often misused in a pejorative context,
+				where "cracker" would be the correct term.  See also: cracker.
+			-->
+		</explanation>
 		<tag>computer</tag>
 		<tag>security</tag>
 	</concept>