diff -r 65a956596368 -r 834d32f01b00 data/dictionary.xml
--- a/data/dictionary.xml	Fri Aug 16 14:15:38 2013 +0200
+++ b/data/dictionary.xml	Fri Aug 16 14:33:33 2013 +0200
@@ -1427,7 +1427,16 @@
 	</concept>
 	<concept>
 		<term abbreviation="POSIX" completeForm="Portable Operating System Interface" language="en"/>
-		<explanation language="en"><text></text></explanation>
+		<explanation language="en">
+			<text>
+				a family of standards for maintaining compatibility between operating systems;
+				defines API, command line shells and utility interfaces
+				and thus brings compatibility amog many variants of unix and unix-like operating systems;
+				the name POSIX was suggested by Richard Stallman (the standards was formerly known as IEEE-IX);
+				there are standards for e.g. process creation and control, signals, pipes, message passing, shared memory or semaphores;
+				Examples of fully or mostly POSIX-compliant systems: AIX, IRIS, Solaris, OS X, GNU/Linux, BeOS (Haiku) or several BSD variants
+			</text>
+		</explanation>
 		<tag>computer</tag>
 	</concept>
 	<concept>