diff --git a/CHANGELOG b/CHANGELOG
index 95dd8a1..4cf90a1 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,8 +1,13 @@
-Version 0.8.7 prerelease (2009.09.08):
+Version 0.9.0 prerelease (2009.09.15):
     * added:   new language: Swedish
                translation made by: Lars 'Bäfvert' Gäfvert <lars.gafvert at gmail dot com>
-     
-               
+    * changed: version of the TTMath library: 0.9.0 prerelease now
+
+    Changes from TTMath 0.9.0 prerelease relating to TTCalc:
+    * added:   gamma() function 
+    * changed: factorial() function is very fast now
+
+    
 Version 0.8.6 (2009.06.30):
     * added:   new language: Russian
                translation made by: Vladimir Gladilovich <vdgladilovich at gmail dot com>
diff --git a/help/other_functions.html b/help/other_functions.html
index bfbf33b..9cc58a4 100644
--- a/help/other_functions.html
+++ b/help/other_functions.html
@@ -9,6 +9,7 @@
 		<param name="Keyword" value="sqrt">
 		<param name="Keyword" value="root">
 		<param name="Keyword" value="factorial">
+		<param name="Keyword" value="gamma">
 		<param name="Keyword" value="abs">
 		<param name="Keyword" value="sgn">
 		<param name="Keyword" value="mod">
@@ -40,9 +41,12 @@ root(8;3)=2<br>
 root(-8;3)=-2
 </dd>
 
-<dt>factorial(x)</dt>
+<dt>factorial(n)</dt>
 <dd>The factorial function<br>factorial(6)=1*2*3*4*5*6=720</dd>
 
+<dt>gamma(x)</dt>
+<dd>The gamma function<br>gamma(45.89)=7,861174...e+55</dd>
+
 <dt>abs(x)</dt>
 <dd>The absolute value of x<br>abs(-10)=10</dd>
 
diff --git a/src/compileconfig.h b/src/compileconfig.h
index 86cd8b2..19d9291 100644
--- a/src/compileconfig.h
+++ b/src/compileconfig.h
@@ -54,8 +54,8 @@
 	if zero that means this is the release version of the program
 */
 #define TTCALC_MAJOR_VER		0
-#define TTCALC_MINOR_VER		8
-#define TTCALC_REVISION_VER		7
+#define TTCALC_MINOR_VER		9
+#define TTCALC_REVISION_VER		0
 #define TTCALC_PRERELEASE_VER	1
 
 
diff --git a/src/languages.cpp b/src/languages.cpp
index 17a1872..bd14325 100644
--- a/src/languages.cpp
+++ b/src/languages.cpp
@@ -855,7 +855,7 @@ void Languages::InitGuiMessagesTab()
 	InsertGuiPair(menu_view_lang_danish,	"&Dansk");
 	InsertGuiPair(menu_view_lang_chinese,	"&Kinesisk"); // 'Kinesisk' is a correct translation for 'Chinese'?
 	InsertGuiPair(menu_view_lang_russian,	"&Russian");
-	InsertGuiPair(menu_view_lang_swedish,   "&Swedish");
+	InsertGuiPair(menu_view_lang_swedish,   "S&wedish");
 	InsertGuiPair(menu_view_close_program,	"&Afslut");
 	InsertGuiPair(menu_edit_undo,			"&Fortryd");
 	InsertGuiPair(menu_edit_paste,			"&Sæt ind");
@@ -1251,9 +1251,9 @@ void Languages::InitGuiMessagesTab()
 	InsertGuiPair(menu_view_lang_polish,	"&Polska");
 	InsertGuiPair(menu_view_lang_spanish,	"&Spanska");
 	InsertGuiPair(menu_view_lang_danish,	"&Danska");
-	InsertGuiPair(menu_view_lang_chinese,	"&Kinesiska"); // 'Kinesisk' is a correct translation for 'Chinese'?
+	InsertGuiPair(menu_view_lang_chinese,	"&Kinesiska");
 	InsertGuiPair(menu_view_lang_russian,	"&Ryska");
-	InsertGuiPair(menu_view_lang_swedish,   "&Swedish");
+	InsertGuiPair(menu_view_lang_swedish,   "S&venska");
 	InsertGuiPair(menu_view_close_program,	"&Avsluta");
 	InsertGuiPair(menu_edit_undo,			"&Ångra");
 	InsertGuiPair(menu_edit_paste,			"&Klistra in");