diff --git a/CMakeLists.txt b/CMakeLists.txt
index b9282faee..5f3a0fcc1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -104,7 +104,6 @@ find_package(FFmpeg REQUIRED)
 
 set (FFMPEG_LIBRARIES ${FFMPEG_LIBRARIES} ${SWSCALE_LIBRARY})
 
-message(STATUS ${FFMPEG_LIBRARIES})
 if ( NOT AVCODEC_FOUND OR NOT AVFORMAT_FOUND OR NOT AVUTIL_FOUND OR NOT SWSCALE_FOUND )
     message(FATAL_ERROR "FFmpeg component required, but not found!")
 endif()
@@ -156,7 +155,18 @@ endif()
 
 # Dependencies
 
-find_package(Qt4 REQUIRED COMPONENTS QtCore QtGui QtNetwork)
+set(DESIRED_QT_VERSION 4 CACHE STRING "The QT version OpenMW should use (4 or 5)")
+message(STATUS "Using Qt${DESIRED_QT_VERSION}")
+
+if (DESIRED_QT_VERSION MATCHES 4)
+    find_package(Qt4 REQUIRED COMPONENTS QtCore QtGui QtNetwork)
+else()
+    find_package(Qt5Widgets REQUIRED)
+    find_package(Qt5Core REQUIRED)
+    find_package(Qt5Network REQUIRED)
+    # Instruct CMake to run moc automatically when needed.
+    #set(CMAKE_AUTOMOC ON)
+endif()
 
 # Fix for not visible pthreads functions for linker with glibc 2.15
 if (UNIX AND NOT APPLE)
diff --git a/apps/launcher/CMakeLists.txt b/apps/launcher/CMakeLists.txt
index e392b8efc..66cc157d3 100644
--- a/apps/launcher/CMakeLists.txt
+++ b/apps/launcher/CMakeLists.txt
@@ -65,12 +65,17 @@ if(WIN32)
     set(QT_USE_QTMAIN TRUE)
 endif(WIN32)
 
-QT4_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/launcher/launcher.qrc)
-QT4_WRAP_CPP(MOC_SRCS ${LAUNCHER_HEADER_MOC})
-QT4_WRAP_UI(UI_HDRS ${LAUNCHER_UI})
-
+if (DESIRED_QT_VERSION MATCHES 4)
+    include(${QT_USE_FILE})
+    QT4_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/launcher/launcher.qrc)
+    QT4_WRAP_CPP(MOC_SRCS ${LAUNCHER_HEADER_MOC})
+    QT4_WRAP_UI(UI_HDRS ${LAUNCHER_UI})
+else()
+    QT5_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/launcher/launcher.qrc)
+    QT5_WRAP_CPP(MOC_SRCS ${LAUNCHER_HEADER_MOC})
+    QT5_WRAP_UI(UI_HDRS ${LAUNCHER_UI})
+endif()
 
-include(${QT_USE_FILE})
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 if(NOT WIN32)
     include_directories(${LIBUNSHIELD_INCLUDE_DIR})
@@ -90,14 +95,18 @@ target_link_libraries(openmw-launcher
     ${OGRE_LIBRARIES}
     ${OGRE_STATIC_PLUGINS}
     ${SDL2_LIBRARY_ONLY}
-    ${QT_QTGUI_LIBRARY}
-    ${QT_QTCORE_LIBRARY}
     components
 )
 
+if (DESIRED_QT_VERSION MATCHES 4)
+    target_link_libraries(openmw-launcher ${QT_QTGUI_LIBRARY} ${QT_QTCORE_LIBRARY})
+else()
+    qt5_use_modules(openmw-launcher Widgets Core)
+endif()
 
 if (BUILD_WITH_CODE_COVERAGE)
   add_definitions (--coverage)
   target_link_libraries(openmw-launcher gcov)
 endif()
 
+
diff --git a/apps/opencs/CMakeLists.txt b/apps/opencs/CMakeLists.txt
index c011f4695..402bd335a 100644
--- a/apps/opencs/CMakeLists.txt
+++ b/apps/opencs/CMakeLists.txt
@@ -153,11 +153,16 @@ if(WIN32)
     set(QT_USE_QTMAIN TRUE)
 endif(WIN32)
 
-include(${QT_USE_FILE})
-
-qt4_wrap_ui(OPENCS_UI_HDR ${OPENCS_UI})
-qt4_wrap_cpp(OPENCS_MOC_SRC ${OPENCS_HDR_QT})
-qt4_add_resources(OPENCS_RES_SRC ${OPENCS_RES})
+if (DESIRED_QT_VERSION MATCHES 4)
+    include(${QT_USE_FILE})
+    qt4_wrap_ui(OPENCS_UI_HDR ${OPENCS_UI})
+    qt4_wrap_cpp(OPENCS_MOC_SRC ${OPENCS_HDR_QT})
+    qt4_add_resources(OPENCS_RES_SRC ${OPENCS_RES})
+else()
+    qt5_wrap_ui(OPENCS_UI_HDR ${OPENCS_UI})
+    qt5_wrap_cpp(OPENCS_MOC_SRC ${OPENCS_HDR_QT})
+    qt5_add_resources(OPENCS_RES_SRC ${OPENCS_RES})
+endif()
 
 # for compiled .ui files
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
@@ -202,13 +207,19 @@ target_link_libraries(openmw-cs
     ${Boost_FILESYSTEM_LIBRARY}
     ${Boost_PROGRAM_OPTIONS_LIBRARY}
     ${Boost_WAVE_LIBRARY}
-    ${QT_QTGUI_LIBRARY}
-    ${QT_QTCORE_LIBRARY}
-    ${QT_QTNETWORK_LIBRARY}
     ${BULLET_LIBRARIES}
     components
 )
 
+if (DESIRED_QT_VERSION MATCHES 4)
+    target_link_libraries(openmw-cs
+    ${QT_QTGUI_LIBRARY}
+    ${QT_QTCORE_LIBRARY}
+    ${QT_QTNETWORK_LIBRARY})
+else()
+    qt5_use_modules(openmw-cs Widgets Core Network)
+endif()
+
 if (WIN32)
     target_link_libraries(openmw-cs ${Boost_LOCALE_LIBRARY})
 endif()
diff --git a/apps/opencs/model/world/idtableproxymodel.cpp b/apps/opencs/model/world/idtableproxymodel.cpp
index d8932d205..516644713 100644
--- a/apps/opencs/model/world/idtableproxymodel.cpp
+++ b/apps/opencs/model/world/idtableproxymodel.cpp
@@ -52,9 +52,10 @@ QModelIndex CSMWorld::IdTableProxyModel::getModelIndex (const std::string& id, i
 
 void CSMWorld::IdTableProxyModel::setFilter (const boost::shared_ptr<CSMFilter::Node>& filter)
 {
+    beginResetModel();
     mFilter = filter;
     updateColumnMap();
-    reset();
+    endResetModel();
 }
 
 bool CSMWorld::IdTableProxyModel::lessThan(const QModelIndex &left, const QModelIndex &right) const
diff --git a/apps/opencs/view/doc/view.cpp b/apps/opencs/view/doc/view.cpp
index 2485caa88..64b066eb1 100644
--- a/apps/opencs/view/doc/view.cpp
+++ b/apps/opencs/view/doc/view.cpp
@@ -7,7 +7,7 @@
 #include <QMenuBar>
 #include <QMdiArea>
 #include <QDockWidget>
-#include <QtGui/QApplication>
+#include <QApplication>
 #include <QDesktopWidget>
 #include <QScrollArea>
 #include <QHBoxLayout>
diff --git a/apps/opencs/view/doc/viewmanager.cpp b/apps/opencs/view/doc/viewmanager.cpp
index b2f681df1..7c79302d7 100644
--- a/apps/opencs/view/doc/viewmanager.cpp
+++ b/apps/opencs/view/doc/viewmanager.cpp
@@ -6,6 +6,8 @@
 
 #include <QApplication>
 #include <QDesktopWidget>
+#include <QMessageBox>
+#include <QPushButton>
 
 #include "../../model/doc/documentmanager.hpp"
 #include "../../model/doc/document.hpp"
@@ -24,10 +26,6 @@
 
 #include "view.hpp"
 
-#include <QMessageBox>
-#include <QPushButton>
-#include <QtGui/QApplication>
-
 void CSVDoc::ViewManager::updateIndices()
 {
     std::map<CSMDoc::Document *, std::pair<int, int> > documents;
diff --git a/apps/opencs/view/render/unpagedworldspacewidget.cpp b/apps/opencs/view/render/unpagedworldspacewidget.cpp
index 462b62b7a..383382938 100644
--- a/apps/opencs/view/render/unpagedworldspacewidget.cpp
+++ b/apps/opencs/view/render/unpagedworldspacewidget.cpp
@@ -6,7 +6,7 @@
 #include <OgreColourValue.h>
 #include <OgreCamera.h>
 
-#include <QtGui/qevent.h>
+#include <QEvent>
 
 #include "../../model/doc/document.hpp"
 
diff --git a/apps/opencs/view/render/worldspacewidget.cpp b/apps/opencs/view/render/worldspacewidget.cpp
index e88814818..ba0ec8446 100644
--- a/apps/opencs/view/render/worldspacewidget.cpp
+++ b/apps/opencs/view/render/worldspacewidget.cpp
@@ -7,7 +7,12 @@
 #include <OgreSceneManager.h>
 #include <OgreEntity.h>
 
-#include <QtGui/qevent.h>
+#include <QEvent>
+#include <QDragEnterEvent>
+#include <QDragMoveEvent>
+#include <QDropEvent>
+#include <QMouseEvent>
+#include <QKeyEvent>
 
 #include "../../model/world/universalid.hpp"
 #include "../../model/world/idtable.hpp"
diff --git a/apps/opencs/view/settings/dialog.cpp b/apps/opencs/view/settings/dialog.cpp
index e8832e2bc..38eb7bbc7 100644
--- a/apps/opencs/view/settings/dialog.cpp
+++ b/apps/opencs/view/settings/dialog.cpp
@@ -8,19 +8,12 @@
 #include <QStackedWidget>
 #include <QtGui>
 #include <QSplitter>
+#include <QDesktopWidget>
 
 #include "../../model/settings/usersettings.hpp"
 
 #include "page.hpp"
 
-#include <QApplication>
-
-#include <QTreeView>
-#include <QListView>
-#include <QTableView>
-
-#include <QStandardItemModel>
-#include <QStandardItem>
 
 CSVSettings::Dialog::Dialog(QMainWindow *parent)
     : SettingWindow (parent), mStackedWidget (0), mDebugMode (false)
diff --git a/apps/opencs/view/settings/dialog.hpp b/apps/opencs/view/settings/dialog.hpp
index cb85bddb9..e3a3f575a 100644
--- a/apps/opencs/view/settings/dialog.hpp
+++ b/apps/opencs/view/settings/dialog.hpp
@@ -3,7 +3,6 @@
 
 #include "settingwindow.hpp"
 #include "resizeablestackedwidget.hpp"
-#include <QStandardItem>
 
 class QStackedWidget;
 class QListWidget;
@@ -26,10 +25,6 @@ namespace CSVSettings {
 
         explicit Dialog (QMainWindow *parent = 0);
 
-        ///Enables setting debug mode.  When the dialog opens, a page is created
-        ///which displays the SettingModel's contents in a Tree view.
-        void enableDebugMode (bool state, QStandardItemModel *model = 0);
-
     protected:
 
         /// Settings are written on close
diff --git a/apps/opencs/view/tools/reporttable.cpp b/apps/opencs/view/tools/reporttable.cpp
index 7cfe8e4f0..c1c8a35dd 100644
--- a/apps/opencs/view/tools/reporttable.cpp
+++ b/apps/opencs/view/tools/reporttable.cpp
@@ -9,6 +9,8 @@
 #include <QStyledItemDelegate>
 #include <QTextDocument>
 #include <QPainter>
+#include <QContextMenuEvent>
+#include <QMouseEvent>
 
 #include "../../model/tools/reportmodel.hpp"
 
@@ -121,7 +123,11 @@ CSVTools::ReportTable::ReportTable (CSMDoc::Document& document,
     const CSMWorld::UniversalId& id, bool richTextDescription, QWidget *parent)
 : CSVWorld::DragRecordTable (document, parent), mModel (document.getReport (id))
 {
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+    horizontalHeader()->setSectionResizeMode (QHeaderView::Interactive);
+#else
     horizontalHeader()->setResizeMode (QHeaderView::Interactive);
+#endif
     horizontalHeader()->setStretchLastSection (true);
     verticalHeader()->hide();
     setSortingEnabled (true);
diff --git a/apps/opencs/view/widget/scenetoolrun.cpp b/apps/opencs/view/widget/scenetoolrun.cpp
index 8de334efe..4c9eb676e 100644
--- a/apps/opencs/view/widget/scenetoolrun.cpp
+++ b/apps/opencs/view/widget/scenetoolrun.cpp
@@ -65,8 +65,13 @@ CSVWidget::SceneToolRun::SceneToolRun (SceneToolbar *parent, const QString& tool
     mTable->setShowGrid (false);
     mTable->verticalHeader()->hide();
     mTable->horizontalHeader()->hide();
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+    mTable->horizontalHeader()->setSectionResizeMode (0, QHeaderView::Stretch);
+    mTable->horizontalHeader()->setSectionResizeMode (1, QHeaderView::ResizeToContents);
+#else
     mTable->horizontalHeader()->setResizeMode (0, QHeaderView::Stretch);
     mTable->horizontalHeader()->setResizeMode (1, QHeaderView::ResizeToContents);
+#endif
     mTable->setSelectionMode (QAbstractItemView::NoSelection);
 
     layout->addWidget (mTable);
diff --git a/apps/opencs/view/world/dragrecordtable.cpp b/apps/opencs/view/world/dragrecordtable.cpp
index 7032fee6d..2a1ae1f40 100644
--- a/apps/opencs/view/world/dragrecordtable.cpp
+++ b/apps/opencs/view/world/dragrecordtable.cpp
@@ -1,4 +1,5 @@
 #include <QDrag>
+#include <QDragEnterEvent>
 
 #include "../../model/world/tablemimedata.hpp"
 #include "dragrecordtable.hpp"
diff --git a/apps/opencs/view/world/dragrecordtable.hpp b/apps/opencs/view/world/dragrecordtable.hpp
index 4996c03ac..48f9e2528 100644
--- a/apps/opencs/view/world/dragrecordtable.hpp
+++ b/apps/opencs/view/world/dragrecordtable.hpp
@@ -2,7 +2,7 @@
 #define CSV_WORLD_DRAGRECORDTABLE_H
 
 #include <QTableView>
-#include <QtGui/qevent.h>
+#include <QEvent>
 
 class QWidget;
 class QAction;
diff --git a/apps/opencs/view/world/nestedtable.cpp b/apps/opencs/view/world/nestedtable.cpp
index 5c8762020..112873cb9 100644
--- a/apps/opencs/view/world/nestedtable.cpp
+++ b/apps/opencs/view/world/nestedtable.cpp
@@ -23,7 +23,11 @@ CSVWorld::NestedTable::NestedTable(CSMDoc::Document& document,
     setSelectionBehavior (QAbstractItemView::SelectRows);
     setSelectionMode (QAbstractItemView::ExtendedSelection);
 
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+    horizontalHeader()->setSectionResizeMode (QHeaderView::Interactive);
+#else
     horizontalHeader()->setResizeMode (QHeaderView::Interactive);
+#endif
     verticalHeader()->hide();
 
     int columns = model->columnCount(QModelIndex());
diff --git a/apps/opencs/view/world/nestedtable.hpp b/apps/opencs/view/world/nestedtable.hpp
index b8e91844c..5db977942 100644
--- a/apps/opencs/view/world/nestedtable.hpp
+++ b/apps/opencs/view/world/nestedtable.hpp
@@ -2,7 +2,7 @@
 #define CSV_WORLD_NESTEDTABLE_H
 
 #include <QTableView>
-#include <QtGui/qevent.h>
+#include <QEvent>
 
 class QUndoStack;
 class QAction;
diff --git a/apps/opencs/view/world/table.cpp b/apps/opencs/view/world/table.cpp
index bb3dfa4d3..b4efbd3c8 100644
--- a/apps/opencs/view/world/table.cpp
+++ b/apps/opencs/view/world/table.cpp
@@ -282,7 +282,11 @@ CSVWorld::Table::Table (const CSMWorld::UniversalId& id,
     mDispatcher = new CSMWorld::CommandDispatcher (document, id, this);
 
     setModel (mProxyModel);
+#if QT_VERSION >= QT_VERSION_CHECK(5,0,0)
+    horizontalHeader()->setSectionResizeMode (QHeaderView::Interactive);
+#else
     horizontalHeader()->setResizeMode (QHeaderView::Interactive);
+#endif
     verticalHeader()->hide();
     setSortingEnabled (sorting);
     setSelectionBehavior (QAbstractItemView::SelectRows);
diff --git a/apps/opencs/view/world/table.hpp b/apps/opencs/view/world/table.hpp
index becb21f65..67bf3fe85 100644
--- a/apps/opencs/view/world/table.hpp
+++ b/apps/opencs/view/world/table.hpp
@@ -4,7 +4,7 @@
 #include <vector>
 #include <string>
 
-#include <QtGui/qevent.h>
+#include <QEvent>
 
 #include "../../model/filter/node.hpp"
 #include "../../model/world/columnbase.hpp"
diff --git a/apps/opencs/view/world/tablesubview.cpp b/apps/opencs/view/world/tablesubview.cpp
index af0b64447..faff4c429 100644
--- a/apps/opencs/view/world/tablesubview.cpp
+++ b/apps/opencs/view/world/tablesubview.cpp
@@ -6,6 +6,7 @@
 #include <QHeaderView>
 #include <QApplication>
 #include <QDesktopWidget>
+#include <QDropEvent>
 
 #include "../../model/doc/document.hpp"
 #include "../../model/world/tablemimedata.hpp"
diff --git a/apps/wizard/CMakeLists.txt b/apps/wizard/CMakeLists.txt
index 6506541ee..5cd874863 100644
--- a/apps/wizard/CMakeLists.txt
+++ b/apps/wizard/CMakeLists.txt
@@ -89,12 +89,17 @@ if(WIN32)
     set(QT_USE_QTMAIN TRUE)
 endif(WIN32)
 
-QT4_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/wizard/wizard.qrc)
-QT4_WRAP_CPP(MOC_SRCS ${WIZARD_HEADER_MOC})
-QT4_WRAP_UI(UI_HDRS ${WIZARD_UI})
-
+if (DESIRED_QT_VERSION MATCHES 4)
+    include(${QT_USE_FILE})
+    QT4_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/wizard/wizard.qrc)
+    QT4_WRAP_CPP(MOC_SRCS ${WIZARD_HEADER_MOC})
+    QT4_WRAP_UI(UI_HDRS ${WIZARD_UI})
+else()
+    QT5_ADD_RESOURCES(RCC_SRCS ${CMAKE_SOURCE_DIR}/files/wizard/wizard.qrc)
+    QT5_WRAP_CPP(MOC_SRCS ${WIZARD_HEADER_MOC})
+    QT5_WRAP_UI(UI_HDRS ${WIZARD_UI})
+endif()
 
-include(${QT_USE_FILE})
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
 if (OPENMW_USE_UNSHIELD)
@@ -111,11 +116,17 @@ add_executable(openmw-wizard
 )
 
 target_link_libraries(openmw-wizard
-    ${QT_QTGUI_LIBRARY}
-    ${QT_QTCORE_LIBRARY}
     components
 )
 
+if (DESIRED_QT_VERSION MATCHES 4)
+    target_link_libraries(openmw-wizard
+    ${QT_QTGUI_LIBRARY}
+    ${QT_QTCORE_LIBRARY})
+else()
+    qt5_use_modules(openmw-wizard Widgets Core)
+endif()
+
 if (OPENMW_USE_UNSHIELD)
     target_link_libraries(openmw-wizard ${LIBUNSHIELD_LIBRARY})
 endif()
diff --git a/apps/wizard/unshield/unshieldworker.cpp b/apps/wizard/unshield/unshieldworker.cpp
index 11e090ed1..9daea2b71 100644
--- a/apps/wizard/unshield/unshieldworker.cpp
+++ b/apps/wizard/unshield/unshieldworker.cpp
@@ -6,7 +6,6 @@
 #include <QWriteLocker>
 #include <QFileDialog>
 #include <QFileInfo>
-#include <QFileInfoListIterator>
 #include <QStringList>
 #include <QTextStream>
 #include <QTextCodec>
diff --git a/apps/wizard/unshield/unshieldworker.hpp b/apps/wizard/unshield/unshieldworker.hpp
index 5ea7b04ae..c1d3cfff1 100644
--- a/apps/wizard/unshield/unshieldworker.hpp
+++ b/apps/wizard/unshield/unshieldworker.hpp
@@ -24,7 +24,6 @@ namespace Wizard
     class UnshieldWorker : public QObject
     {
         Q_OBJECT
-        Q_ENUMS(Wizard::Component)
 
     public:
         UnshieldWorker(QObject *parent = 0);
diff --git a/components/CMakeLists.txt b/components/CMakeLists.txt
index a6ca2e86d..cbb63bf07 100644
--- a/components/CMakeLists.txt
+++ b/components/CMakeLists.txt
@@ -126,27 +126,30 @@ add_component_dir (version
 set (ESM_UI ${CMAKE_SOURCE_DIR}/files/ui/contentselector.ui
     )
 
-if(QT_QTGUI_LIBRARY AND QT_QTCORE_LIBRARY)
-    add_component_qt_dir (contentselector
-        model/modelitem model/esmfile
-        model/naturalsort model/contentmodel
-		model/loadordererror
-        view/combobox view/contentselector
-        )
-    add_component_qt_dir (config
-        gamesettings
-        launchersettings
-        settingsbase
-        )
-
-    add_component_qt_dir (process
-        processinvoker
-    )
-
-   include(${QT_USE_FILE})
+add_component_qt_dir (contentselector
+    model/modelitem model/esmfile
+    model/naturalsort model/contentmodel
+    model/loadordererror
+    view/combobox view/contentselector
+    )
+add_component_qt_dir (config
+    gamesettings
+    launchersettings
+    settingsbase
+    )
+
+add_component_qt_dir (process
+    processinvoker
+)
+
+if (DESIRED_QT_VERSION MATCHES 4)
+    include(${QT_USE_FILE})
     QT4_WRAP_UI(ESM_UI_HDR ${ESM_UI})
-   QT4_WRAP_CPP(MOC_SRCS ${COMPONENT_MOC_FILES})
-endif(QT_QTGUI_LIBRARY AND QT_QTCORE_LIBRARY)
+    QT4_WRAP_CPP(MOC_SRCS ${COMPONENT_MOC_FILES})
+else()
+    QT5_WRAP_UI(ESM_UI_HDR ${ESM_UI})
+    QT5_WRAP_CPP(MOC_SRCS ${COMPONENT_MOC_FILES})
+endif()
 
 if (CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     if("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64" AND NOT APPLE)
@@ -166,11 +169,17 @@ target_link_libraries(components
     ${Boost_WAVE_LIBRARY}
     ${OGRE_LIBRARIES}
     ${OENGINE_LIBRARY}    
-    ${QT_QTCORE_LIBRARY}
-    ${QT_QTGUI_LIBRARY}
     ${BULLET_LIBRARIES}
 )
 
+if (DESIRED_QT_VERSION MATCHES 4)
+    target_link_libraries(components
+    ${QT_QTCORE_LIBRARY}
+    ${QT_QTGUI_LIBRARY})
+else()
+    qt5_use_modules(components Widgets Core)
+endif()
+
 if (GIT_CHECKOUT)
     add_dependencies (components git-version)
 endif (GIT_CHECKOUT)