diff --git a/documentation.frt b/documentation.frt
index c8ea719..c7a7a7c 100644
--- a/documentation.frt
+++ b/documentation.frt
@@ -12,3 +12,48 @@ Drop the topmost element of the stack
 ( a b -- b a )
 Swap two topmost elements of the stack
 " doc-word
+
+' cr g"
+( -- )
+Make following output appear at the beginning of the next line
+" doc-word
+
+' case g"
+( -- )
+Tell where is the beginning of the "case...of...endof...endcase" - structure
+" doc-word
+
+' of g"
+( -- )
+Mark the start of code for a "case" - clause in the "case...of...endof...endcase" - structure
+" doc-word
+
+' endof g"
+( -- )
+Mark the end of code for a "case" - clause in the "case...of...endof...endcase" - structure
+" doc-word
+
+' endcase g"
+( -- ) 
+Tell where is the ending of the "case...of...endof...endcase" - structure
+" doc-word
+
+' in-range g" 
+( number numfrom numto -- 1/0 )
+Check if number "number" is in range from "numfrom" to "numto"; places 1 on top of the stack if it is in range or 0 otherwise 
+" doc-word
+
+' compiling g"
+( -- state ) 
+Place the current "Forthress" state on top of the stack, i.e. 0 for "interpretation" mode or 1 for "compilation" mode
+" doc-word
+
+' .' g"
+( -- character ) 
+Place character code ( according to ASCII - table ) on top of the stack
+" doc-word
+
+' readce g" 
+( -- character ) 
+Read character and places its "ASCII" - code on top of the stack and place 0 for control characters excluding the case with newline-character, i.e '\n'
+" doc-word 
\ No newline at end of file