diff --git a/comphelper/source/misc/regpathhelper.cxx b/comphelper/source/misc/regpathhelper.cxx
index 5b4fc8b88cdf..898d1224b091 100644
--- a/comphelper/source/misc/regpathhelper.cxx
+++ b/comphelper/source/misc/regpathhelper.cxx
@@ -33,12 +33,11 @@
 #include <osl/file.hxx>
 #include <osl/security.hxx>
 #include <osl/thread.h>
-#include <vos/process.hxx>
+#include <osl/process.h>
 #include <rtl/textenc.h>
 #include <rtl/uri.h>
 #include <rtl/uri.hxx>
 
-using namespace vos;
 using namespace osl;
 using namespace rtl;
 
@@ -66,18 +65,17 @@ namespace comphelper
  */
 static sal_Bool retrievePortalUserDir( OUString *pDirectory )
 {
-    OStartupInfo startInfo;
-    sal_uInt32 nArgs = startInfo.getCommandArgCount();
+    sal_uInt32 nArgs = osl_getCommandArgCount();
     sal_Bool bIsPortalUser = sal_False;
     OUString sArg;
     while( nArgs > 0 )
-      {
-        if ( !startInfo.getCommandArg(--nArgs, sArg) )
-          {
+    {
+        if ( !osl_getCommandArg(--nArgs, &sArg.pData) )
+        {
             if ( sArg.indexOf(OUString::createFromAscii("-userid")) == 0 )
             {
 
-                  bIsPortalUser = sal_True;
+                bIsPortalUser = sal_True;
                 sal_Int32 nStart = sArg.lastIndexOf( '[' );
                 sal_Int32 nEnd   = sArg.lastIndexOf( ']' );
                 if( -1 == nStart || -1 == nEnd || nEnd < nStart)
@@ -189,8 +187,7 @@ OUString getPathToSystemRegistry()
     FILE     *f=NULL;
 
     // search in the directory of the executable
-    OStartupInfo info;
-    if( OStartupInfo::E_None == info.getExecutableFile(uBuffer) )
+    if(osl_Process_E_None == osl_getExecutableFile(&uBuffer.pData))
     {
         sal_uInt32  lastIndex = uBuffer.lastIndexOf(PATH_DELEMITTER);
         if (lastIndex > 0)
diff --git a/l10ntools/inc/l10ntools/vosapp.hxx b/l10ntools/inc/l10ntools/vosapp.hxx
index 937994fc5eb7..e45840b4f9df 100644
--- a/l10ntools/inc/l10ntools/vosapp.hxx
+++ b/l10ntools/inc/l10ntools/vosapp.hxx
@@ -5,7 +5,6 @@
 #include <sal/main.h>
 #include <tools/solar.h>
 #include <tools/string.hxx>
-#include <vos/process.hxx>
 
 // Mininmal vcl/svapp compatibility without vcl dependence
 class Application
@@ -19,15 +18,13 @@ public:
 // Urg: Cut & Paste from svapp.cxx: we don't want to depend on vcl
 USHORT Application::GetCommandLineParamCount()
 {
-    vos::OStartupInfo aStartInfo;
-    return (USHORT)aStartInfo.getCommandArgCount();
+    return osl_getCommandArgCount();
 }
 
 XubString Application::GetCommandLineParam( USHORT nParam )
 {
-    vos::OStartupInfo aStartInfo;
     rtl::OUString aParam;
-    aStartInfo.getCommandArg( nParam, aParam );
+    osl_getCommandArg( nParam, &aParam.pData );
     return XubString( aParam );
 }
 
diff --git a/sax/test/saxdemo.cxx b/sax/test/saxdemo.cxx
index 17f286149867..18715609a4c0 100644
--- a/sax/test/saxdemo.cxx
+++ b/sax/test/saxdemo.cxx
@@ -51,7 +51,6 @@
 #include <cppuhelper/implbase1.hxx>
 #include <cppuhelper/implbase3.hxx>
 
-#include <vos/dynload.hxx>
 #include <osl/diagnose.h>
 
 using namespace ::rtl;
diff --git a/sax/test/testcomponent.cxx b/sax/test/testcomponent.cxx
index 128fbebdb3c0..c92e416fc791 100644
--- a/sax/test/testcomponent.cxx
+++ b/sax/test/testcomponent.cxx
@@ -42,7 +42,6 @@
 
 #include <cppuhelper/servicefactory.hxx>
 
-#include <vos/dynload.hxx>
 #include <osl/diagnose.h>
 
 using namespace ::rtl;
diff --git a/svl/inc/pch/precompiled_svl.hxx b/svl/inc/pch/precompiled_svl.hxx
index 2d8d42942c99..387ea3629728 100644
--- a/svl/inc/pch/precompiled_svl.hxx
+++ b/svl/inc/pch/precompiled_svl.hxx
@@ -422,9 +422,6 @@
 
 
 #include <osl/mutex.hxx>
-#include <vos/process.hxx>
-#include <vos/security.hxx>
-#include <vos/thread.hxx>
 
 //---MARKER---
 
diff --git a/svl/source/misc/svldata.cxx b/svl/source/misc/svldata.cxx
index a9d5027f25c8..eb36f0fc8f64 100644
--- a/svl/source/misc/svldata.cxx
+++ b/svl/source/misc/svldata.cxx
@@ -32,7 +32,6 @@
 #include <map>
 #include <tools/resmgr.hxx>
 #include <tools/shl.hxx>
-#include <vos/process.hxx>
 #include <svl/svldata.hxx>
 
 namespace unnamed_svl_svldata {}
diff --git a/svtools/inc/pch/precompiled_svtools.hxx b/svtools/inc/pch/precompiled_svtools.hxx
index c746d53b7c7f..07c0e3a23382 100644
--- a/svtools/inc/pch/precompiled_svtools.hxx
+++ b/svtools/inc/pch/precompiled_svtools.hxx
@@ -426,7 +426,7 @@
 #include <vcl/unohelp.hxx>
 
 #include <osl/mutex.hxx>
-#include <vos/process.hxx>
+#include <osl/process.h>
 
 //---MARKER---
 
diff --git a/svtools/source/misc/svtdata.cxx b/svtools/source/misc/svtdata.cxx
index 6b5228e4b521..9429ac014df9 100644
--- a/svtools/source/misc/svtdata.cxx
+++ b/svtools/source/misc/svtdata.cxx
@@ -32,7 +32,6 @@
 #include <map>
 #include <tools/resmgr.hxx>
 #include <tools/shl.hxx>
-#include <vos/process.hxx>
 #include <svtools/svtdata.hxx>
 #include <vcl/svapp.hxx>
 
diff --git a/toolkit/source/awt/xsimpleanimation.cxx b/toolkit/source/awt/xsimpleanimation.cxx
index e67b44ac9821..925fe57b3436 100644
--- a/toolkit/source/awt/xsimpleanimation.cxx
+++ b/toolkit/source/awt/xsimpleanimation.cxx
@@ -90,7 +90,6 @@ namespace toolkit
     void XSimpleAnimation::ProcessWindowEvent( const VclWindowEvent& _rVclWindowEvent )
     {
         // TODO: XSimpleAnimation::ProcessWindowEvent
-        //::vos::OClearableGuard aGuard( GetMutex() );
         //Reference< XSimpleAnimation > xKeepAlive( this );
         //SpinButton* pSpinButton = static_cast< SpinButton* >( GetWindow() );
         //if ( !pSpinButton )
diff --git a/toolkit/source/awt/xthrobber.cxx b/toolkit/source/awt/xthrobber.cxx
index 96328cfd3e3a..01527839d75f 100644
--- a/toolkit/source/awt/xthrobber.cxx
+++ b/toolkit/source/awt/xthrobber.cxx
@@ -96,7 +96,6 @@ namespace toolkit
             bInit = true;
         }
         // TODO: XSimpleAnimation::ProcessWindowEvent
-        //::vos::OClearableGuard aGuard( GetMutex() );
         //Reference< XSimpleAnimation > xKeepAlive( this );
         //SpinButton* pSpinButton = static_cast< SpinButton* >( GetWindow() );
         //if ( !pSpinButton )
diff --git a/tools/inc/pch/precompiled_tools.hxx b/tools/inc/pch/precompiled_tools.hxx
index 60ab99762cc6..dfed2ac7d4f6 100644
--- a/tools/inc/pch/precompiled_tools.hxx
+++ b/tools/inc/pch/precompiled_tools.hxx
@@ -87,8 +87,6 @@
 #include "sys/stat.h"
 #include "sys/types.h"
 
-#include "osl/mutex.hxx"
-#include "vos/process.hxx"
 //---MARKER---
 #endif
 
diff --git a/tools/source/testtoolloader/testtoolloader.cxx b/tools/source/testtoolloader/testtoolloader.cxx
index 5944801f4432..22cddf65673c 100644
--- a/tools/source/testtoolloader/testtoolloader.cxx
+++ b/tools/source/testtoolloader/testtoolloader.cxx
@@ -32,7 +32,7 @@
 #include "tools/testtoolloader.hxx"
 #include <osl/module.h>
 #include <rtl/logfile.hxx>
-#include <vos/process.hxx>
+#include <osl/process.h>
 #include "tools/solar.h"
 #include "tools/string.hxx"
 #include "tools/debug.hxx"
@@ -57,16 +57,14 @@ static bool bLoggerStarted = false;
 
 sal_uInt32 GetCommandLineParamCount()
 {
-    vos::OStartupInfo aStartInfo;
-    return aStartInfo.getCommandArgCount();
+    return osl_getCommandArgCount();
 }
 
 String GetCommandLineParam( sal_uInt32 nParam )
 {
-    vos::OStartupInfo aStartInfo;
     ::rtl::OUString aParam;
-    vos::OStartupInfo::TStartupError eError = aStartInfo.getCommandArg( nParam, aParam );
-    if ( eError == vos::OStartupInfo::E_None )
+    oslProcessError eError = osl_getCommandArg( nParam, &aParam.pData );
+    if ( eError == osl_Process_E_None )
         return String( aParam );
     else
     {
diff --git a/unotools/source/config/defaultoptions.cxx b/unotools/source/config/defaultoptions.cxx
index 8698047a7b55..a4611ab74ef5 100644
--- a/unotools/source/config/defaultoptions.cxx
+++ b/unotools/source/config/defaultoptions.cxx
@@ -40,7 +40,6 @@
 #include <com/sun/star/uno/Sequence.hxx>
 #include <osl/mutex.hxx>
 
-#include <vos/process.hxx>
 #include <unotools/localfilehelper.hxx>
 #include <rtl/instance.hxx>
 
diff --git a/unotools/source/config/pathoptions.cxx b/unotools/source/config/pathoptions.cxx
index 5ce92c5d6fee..8c850a805372 100644
--- a/unotools/source/config/pathoptions.cxx
+++ b/unotools/source/config/pathoptions.cxx
@@ -43,7 +43,6 @@
 #include <unotools/bootstrap.hxx>
 
 #include <unotools/ucbhelper.hxx>
-#include <vos/process.hxx>
 #include <comphelper/processfactory.hxx>
 #include <com/sun/star/beans/XFastPropertySet.hpp>
 #include <com/sun/star/beans/XPropertySet.hpp>
diff --git a/vcl/aqua/source/app/salinst.cxx b/vcl/aqua/source/app/salinst.cxx
index bf8c79d8cea9..4d8a205bdf3c 100644
--- a/vcl/aqua/source/app/salinst.cxx
+++ b/vcl/aqua/source/app/salinst.cxx
@@ -112,7 +112,7 @@ class AquaDelayedSettingsChanged : public Timer
 
 void AquaSalInstance::delayedSettingsChanged( bool bInvalidate )
 {
-    vos::OGuard aGuard( *mpSalYieldMutex );
+    osl:SolarGuard aGuard( *mpSalYieldMutex );
     AquaDelayedSettingsChanged* pTimer = new AquaDelayedSettingsChanged( bInvalidate );
     pTimer->SetTimeout( 50 );
     pTimer->Start();
diff --git a/vcl/aqua/source/window/salframeview.mm b/vcl/aqua/source/window/salframeview.mm
index ca9ef4a5e263..8da1bf9f3085 100755
--- a/vcl/aqua/source/window/salframeview.mm
+++ b/vcl/aqua/source/window/salframeview.mm
@@ -408,7 +408,7 @@ static AquaSalFrame* getMouseContainerFrame()
     return mpFrame ? (mpFrame->getClipPath() != 0 ? NO : YES) : YES;
 }
 
-// helper class similar to a vos::OGuard for the SalYieldMutex
+// helper class similar to a osl::SolarGuard for the SalYieldMutex
 // the difference is that it only does tryToAcquire instead of aquire
 // so dreaded deadlocks like #i93512# are prevented
 class TryGuard
diff --git a/vcl/inc/vcl/svdata.hxx b/vcl/inc/vcl/svdata.hxx
index ce5ad4bb9442..8b180183a9b3 100644
--- a/vcl/inc/vcl/svdata.hxx
+++ b/vcl/inc/vcl/svdata.hxx
@@ -110,7 +110,6 @@ class SalI18NImeStatus;
 class DockingManager;
 class VclEventListeners2;
 
-namespace vos { class OMutex; }
 namespace vcl { class DisplayConnection; class SettingsConfigItem; class DeleteOnDeinitBase; }
 namespace utl { class DefaultFontConfiguration; class FontSubstConfiguration; }
 
diff --git a/vcl/os2/inc/salinst.h b/vcl/os2/inc/salinst.h
index ddb2050b33e3..a3d3fdb6bcfc 100644
--- a/vcl/os2/inc/salinst.h
+++ b/vcl/os2/inc/salinst.h
@@ -32,8 +32,6 @@
 #include <vcl/salinst.hxx>
 #include <vcl/solarmutex.hxx>
 
-namespace vos { class OMutex; }
-
 // -------------------
 // - SalInstanceData -
 // -------------------
diff --git a/vcl/test/dndtest.cxx b/vcl/test/dndtest.cxx
index ecca58011c49..31bc02ffd8ef 100644
--- a/vcl/test/dndtest.cxx
+++ b/vcl/test/dndtest.cxx
@@ -45,7 +45,7 @@
 #include <com/sun/star/datatransfer/dnd/XDropTargetListener.hpp>
 #include <com/sun/star/datatransfer/dnd/XDragGestureRecognizer.hpp>
 #include <com/sun/star/datatransfer/dnd/XDragGestureListener.hpp>
-#include <vos/process.hxx>
+#include <osl/process.h>
 
 #include <stdio.h>
 
@@ -156,18 +156,17 @@ public:
 void MyApp::Main()
 {
     OUString aRegistry;
-    OStartupInfo aInfo;
 
-    for( sal_Int32 n = 0, nmax = aInfo.getCommandArgCount(); n < nmax; n++ )
+    for( sal_Int32 n = 0, nmax = osl_getCommandArgCount(); n < nmax; n++ )
     {
         OUString aArg;
 
-        aInfo.getCommandArg( n, aArg );
+        osl_getCommandArg( n, &aArg.pData );
 
         if( aArg.compareTo( OUString::createFromAscii( "-r" ), 2 ) == 0 )
         {
             if ( n + 1 < nmax )
-                aInfo.getCommandArg( ++n, aRegistry );
+                osl_getCommandArg( ++n, &aRegistry.pData );
         }
     }
 
diff --git a/vcl/unx/inc/salsys.h b/vcl/unx/inc/salsys.h
index c74d11306e01..988409027835 100644
--- a/vcl/unx/inc/salsys.h
+++ b/vcl/unx/inc/salsys.h
@@ -30,12 +30,8 @@
 #define _SV_SALSYS_H
 
 #include <vcl/sv.h>
-#ifndef _VOS_MUTEX_HXX
 #include <osl/mutex.hxx>
-#endif
-#ifndef _THREAD_HXX_
 #include <osl/thread.hxx>
-#endif
 #include <vcl/salsys.hxx>
 #include <vcl/dllapi.h>
 
diff --git a/vcl/unx/kde/kdedata.cxx b/vcl/unx/kde/kdedata.cxx
index 9c4f43fc9db7..aeac873aea5f 100644
--- a/vcl/unx/kde/kdedata.cxx
+++ b/vcl/unx/kde/kdedata.cxx
@@ -50,12 +50,11 @@
 #include <osl/thread.h>
 #include <osl/process.h>
 #include <osl/module.h>
+#include <osl/mutex.hxx>
 
 #include <tools/debug.hxx>
 #include "i18n_im.hxx"
 #include "i18n_xkb.hxx"
-#include <vos/process.hxx>
-#include <osl/mutex.hxx>
 
 /* #i59042# override KApplications method for session management
  * since it will interfere badly with our own.
@@ -137,17 +136,16 @@ void KDEXLib::Init()
 
     m_nFakeCmdLineArgs = 1;
     USHORT nIdx;
-    vos::OExtCommandLine aCommandLine;
-    int nParams = aCommandLine.getCommandArgCount();
+    int nParams = osl_getCommandArgCount();
     rtl::OString aDisplay;
     rtl::OUString aParam, aBin;
 
     for ( nIdx = 0; nIdx < nParams; ++nIdx )
     {
-        aCommandLine.getCommandArg( nIdx, aParam );
+        osl_getCommandArg( nIdx, &aParam.pData );
         if ( !m_pFreeCmdLineArgs && aParam.equalsAscii( "-display" ) && nIdx + 1 < nParams )
         {
-            aCommandLine.getCommandArg( nIdx + 1, aParam );
+            osl_getCommandArg( nIdx + 1, &aParam.pData );
             aDisplay = rtl::OUStringToOString( aParam, osl_getThreadTextEncoding() );
 
             m_nFakeCmdLineArgs = 3;
diff --git a/vcl/unx/kde4/KDEXLib.cxx b/vcl/unx/kde4/KDEXLib.cxx
index f4519b301c99..a7ac4547ef67 100644
--- a/vcl/unx/kde4/KDEXLib.cxx
+++ b/vcl/unx/kde4/KDEXLib.cxx
@@ -47,7 +47,7 @@
 #include <i18n_xkb.hxx>
 
 #include <saldata.hxx>
-#include <vos/process.hxx>
+#include <osl/process.h>
 
 #include "KDESalDisplay.hxx"
 
@@ -133,17 +133,17 @@ void KDEXLib::Init()
 
     m_nFakeCmdLineArgs = 2;
     USHORT nIdx;
-    vos::OExtCommandLine aCommandLine;
-    int nParams = aCommandLine.getCommandArgCount();
+
+    int nParams = osl_getCommandArgCount();
     rtl::OString aDisplay;
     rtl::OUString aParam, aBin;
 
     for ( nIdx = 0; nIdx < nParams; ++nIdx )
     {
-        aCommandLine.getCommandArg( nIdx, aParam );
+        osl_getCommandArg( nIdx, &aParam.pData );
         if ( !m_pFreeCmdLineArgs && aParam.equalsAscii( "-display" ) && nIdx + 1 < nParams )
         {
-            aCommandLine.getCommandArg( nIdx + 1, aParam );
+            osl_getCommandArg( nIdx + 1, &aParam.pData );
             aDisplay = rtl::OUStringToOString( aParam, osl_getThreadTextEncoding() );
 
             m_pFreeCmdLineArgs = new char*[ m_nFakeCmdLineArgs + 2 ];
diff --git a/vcl/unx/source/app/saldata.cxx b/vcl/unx/source/app/saldata.cxx
index 657bacb7bb03..609ae471ceaa 100644
--- a/vcl/unx/source/app/saldata.cxx
+++ b/vcl/unx/source/app/saldata.cxx
@@ -57,7 +57,7 @@
 #include <sys/time.h>
 #include <unistd.h>
 #endif
-#include <vos/process.hxx>
+#include <osl/process.h>
 #include <osl/mutex.hxx>
 
 #include "Xproto.h"
@@ -67,7 +67,6 @@
 #include <salframe.h>
 #include <osl/signal.h>
 #include <osl/thread.h>
-#include <osl/process.h>
 #include <rtl/strbuf.hxx>
 #include <rtl/bootstrap.hxx>
 
@@ -401,16 +400,16 @@ void SalXLib::Init()
     Display *pDisp = NULL;
 
     // is there a -display command line parameter?
-    vos::OExtCommandLine aCommandLine;
-    sal_uInt32 nParams = aCommandLine.getCommandArgCount();
+
+    sal_uInt32 nParams = osl_getCommandArgCount();
     rtl::OUString aParam;
     rtl::OString aDisplay;
     for (USHORT i=0; i<nParams; i++)
     {
-        aCommandLine.getCommandArg(i, aParam);
+        osl_getCommandArg(i, &aParam.pData);
         if (aParam.equalsAscii("-display"))
         {
-            aCommandLine.getCommandArg(i+1, aParam);
+            osl_getCommandArg(i+1, &aParam.pData);
             aDisplay = rtl::OUStringToOString(
                    aParam, osl_getThreadTextEncoding());
 
diff --git a/vcl/win/source/app/salinst.cxx b/vcl/win/source/app/salinst.cxx
index ec8384cad451..cc3aba411b59 100644
--- a/vcl/win/source/app/salinst.cxx
+++ b/vcl/win/source/app/salinst.cxx
@@ -104,7 +104,7 @@ LRESULT CALLBACK SalComWndProcW( HWND hWnd, UINT nMsg, WPARAM wParam, LPARAM lPa
 
 // =======================================================================
 
-class SalYieldMutex : public vos::OMutex
+class SalYieldMutex : public vcl::SolarMutexObject
 {
 public: // for ImplSalYield()
     WinSalInstance*             mpInstData;