diff --git a/ueforth/common/vocabulary.fs b/ueforth/common/vocabulary.fs
index 5f0481e..dd00c6b 100644
--- a/ueforth/common/vocabulary.fs
+++ b/ueforth/common/vocabulary.fs
@@ -7,3 +7,28 @@
 : transfer ( "name" ) ' context @ begin 2dup @ <> while @ >link& repeat nip
                       dup @ swap dup @ >link swap ! current @ @ over >link& !
                       current @ ! ;
+
+( Hide some words in an internals vocabulary )
+vocabulary internals   internals definitions
+transfer branch
+transfer 0branch
+transfer 'notfound
+transfer notfound
+transfer immediate?
+transfer evaluate1
+transfer 'sys
+transfer 'heap
+transfer aliteral
+transfer leaving(
+transfer )leaving
+transfer leaving
+transfer leaving,
+transfer (do)
+transfer (?do)
+transfer (+loop)
+transfer parse-quote
+transfer digit
+transfer $@
+transfer see.
+transfer see-loop
+forth definitions
diff --git a/ueforth/posix/posix_desktop.fs b/ueforth/posix/posix_desktop.fs
index 6e8e2c1..e1207fd 100644
--- a/ueforth/posix/posix_desktop.fs
+++ b/ueforth/posix/posix_desktop.fs
@@ -1,6 +1,8 @@
 ( Arguments )
+internals
 : 'argc ( -- a ) 'sys 9 cells + ;
 : 'argv ( -- a ) 'sys 10 cells + ;
+forth
 : argc ( -- n ) 'argc @ ;
 : argv ( n -- a n ) cells 'argv @ + @ z>s ;
 
diff --git a/ueforth/windows/windows.fs b/ueforth/windows/windows.fs
index 3deb1fe..a469c15 100644
--- a/ueforth/windows/windows.fs
+++ b/ueforth/windows/windows.fs
@@ -1,3 +1,5 @@
+vocabulary windows   windows definitions
+
 ( DLL Handling )
 create calls
 ' call0 , ' call1 , ' call2 , ' call3 , ' call4 , ' call5 ,
@@ -102,6 +104,8 @@ $80 constant FILE_ATTRIBUTE_NORMAL
 : d0<ior ( n -- n ior ) dup 0< ior ;
 : invalid?ior ( n -- ior ) $ffffffff = ior ;
 
+forth definitions windows
+
 ( Generic Files )
 $80000000 constant r/o  ( GENERIC_READ )
 $40000000 constant w/o  ( GENERIC_WRITE )
@@ -133,3 +137,5 @@ r/o w/o or constant r/w
 
 ( Other Utils )
 : ms ( n -- ) Sleep ;
+
+forth
diff --git a/ueforth/windows/windows_highlevel.fs b/ueforth/windows/windows_highlevel.fs
index 657a548..2569ff4 100644
--- a/ueforth/windows/windows_highlevel.fs
+++ b/ueforth/windows/windows_highlevel.fs
@@ -1,4 +1,5 @@
 ( Words with OS assist )
+windows
 z" GetProcessHeap" 0 Kernel32 GetProcessHeap
 z" HeapAlloc" 3 Kernel32 HeapAlloc
 z" HeapFree" 3 Kernel32 HeapFree
@@ -7,3 +8,4 @@ GetProcessHeap constant process-heap
 : allocate ( n -- a ior ) process-heap 0 rot HeapAlloc dup 0= ;
 : free ( a -- ior ) process-heap 0 rot HeapFree drop 0 ;
 : resize ( a n -- a ior ) process-heap -rot 0 -rot HeapReAlloc dup 0= ;
+forth