diff --git a/solenv/gbuildtojson/gbuildtojson.cxx b/solenv/gbuildtojson/gbuildtojson.cxx
index 8061b801cd76..4d60ac787a4b 100644
--- a/solenv/gbuildtojson/gbuildtojson.cxx
+++ b/solenv/gbuildtojson/gbuildtojson.cxx
@@ -16,47 +16,45 @@
 #include <string>
 #include <stdio.h>
 
-using namespace std;
-
 int main(int argc, char** argv)
 {
-    const string optsintro("--");
-    map<string, string> vartofile;
+    const std::string optsintro("--");
+    std::map<std::string, std::string> vartofile;
     for(int i=1; i < argc; ++i)
     {
-        const string arg(argv[i]);
+        const std::string arg(argv[i]);
         if(arg.substr(0,2) != optsintro)
         {
-            cerr << "Only option args starting with -- allowed." << endl;
+            std::cerr << "Only option args starting with -- allowed." << std::endl;
             return 1;
         }
         const size_t eqpos = arg.find("=", 2);
-        if(eqpos == string::npos)
+        if(eqpos == std::string::npos)
         {
-            cerr << "Only option args assigning with = allowed." << endl;
+            std::cerr << "Only option args assigning with = allowed." << std::endl;
             return 2;
         }
-        const string argname(arg.substr(2, eqpos-2));
-        vartofile[argname] = arg.substr(eqpos+1, string::npos);
+        const std::string argname(arg.substr(2, eqpos-2));
+        vartofile[argname] = arg.substr(eqpos+1, std::string::npos);
     }
-    cout << "{";
+    std::cout << "{";
     bool first(true);
     for(const auto& varandfile : vartofile)
     {
         if(first)
             first =false;
         else
-            cout << "," << endl;
-        string varupper(varandfile.first);
+            std::cout << "," << std::endl;
+        std::string varupper(varandfile.first);
         for(auto& c : varupper)
             if(c != '_')
                 c = c-32;
-        ifstream filestream(varandfile.second.c_str());
-        stringstream contents;
+        std::ifstream filestream(varandfile.second.c_str());
+        std::stringstream contents;
         contents << filestream.rdbuf();
         filestream.close();
         (void)remove(varandfile.second.c_str());
-        string escapedcontents;
+        std::string escapedcontents;
         for(const auto& c : contents.str())
         {
             if(c=='\\')
@@ -68,9 +66,9 @@ int main(int argc, char** argv)
             else
                 escapedcontents += c;
         }
-        cout << "\"" << varupper << "\": \"" << escapedcontents << "\"";
+        std::cout << "\"" << varupper << "\": \"" << escapedcontents << "\"";
     }
-    cout << "}" << endl;
+    std::cout << "}" << std::endl;
     return 0;
 }
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/solenv/gcc-wrappers/g++.cxx b/solenv/gcc-wrappers/g++.cxx
index ae7dcb6be796..6b352e64c845 100644
--- a/solenv/gcc-wrappers/g++.cxx
+++ b/solenv/gcc-wrappers/g++.cxx
@@ -9,19 +9,17 @@
 
 #include "wrapper.hxx"
 
-using namespace std;
-
 int main(int argc, char* argv[])
 {
-    vector<string> rawargs(argv + 1, argv + argc);
+    std::vector<std::string> rawargs(argv + 1, argv + argc);
 
-    string env_prefix; // defaults to REAL_
+    std::string env_prefix; // defaults to REAL_
     bool verbose = false;
-    string args = processccargs(rawargs, env_prefix, verbose);
+    std::string args = processccargs(rawargs, env_prefix, verbose);
 
-    string command = getexe(env_prefix + "CXX");
-    string flags = getexe(env_prefix + "CXX_FLAGS", true);
-    args.insert(0, flags.empty() ? string() : flags + " ");
+    std::string command = getexe(env_prefix + "CXX");
+    std::string flags = getexe(env_prefix + "CXX_FLAGS", true);
+    args.insert(0, flags.empty() ? std::string() : flags + " ");
 
     setupccenv();
 
diff --git a/solenv/gcc-wrappers/gcc.cxx b/solenv/gcc-wrappers/gcc.cxx
index a51d64ff39fa..05dff957eec4 100644
--- a/solenv/gcc-wrappers/gcc.cxx
+++ b/solenv/gcc-wrappers/gcc.cxx
@@ -9,19 +9,17 @@
 
 #include "wrapper.hxx"
 
-using namespace std;
-
 int main(int argc, char* argv[])
 {
-    vector<string> rawargs(argv + 1, argv + argc);
+    std::vector<std::string> rawargs(argv + 1, argv + argc);
 
-    string env_prefix; // defaults to REAL_
+    std::string env_prefix; // defaults to REAL_
     bool verbose = false;
-    string args = processccargs(rawargs, env_prefix, verbose);
+    std::string args = processccargs(rawargs, env_prefix, verbose);
 
-    string command = getexe(env_prefix + "CC");
-    string flags = getexe(env_prefix + "CC_FLAGS", true);
-    args.insert(0, flags.empty() ? string() : flags + " ");
+    std::string command = getexe(env_prefix + "CC");
+    std::string flags = getexe(env_prefix + "CC_FLAGS", true);
+    args.insert(0, flags.empty() ? std::string() : flags + " ");
 
     setupccenv();
 
diff --git a/solenv/gcc-wrappers/wrapper.cxx b/solenv/gcc-wrappers/wrapper.cxx
index a03b1dddee90..72e48e5a7b37 100644
--- a/solenv/gcc-wrappers/wrapper.cxx
+++ b/solenv/gcc-wrappers/wrapper.cxx
@@ -15,27 +15,25 @@
 
 #define BUFLEN 2048
 
-using namespace std;
-
-string getexe(string exename, bool maybeempty) {
+std::string getexe(std::string exename, bool maybeempty) {
     char* cmdbuf;
     size_t cmdlen;
     _dupenv_s(&cmdbuf,&cmdlen,exename.c_str());
     if(!cmdbuf) {
         if (maybeempty) {
-            return string();
+            return std::string();
         }
-        cout << "Error " << exename << " not defined. Did you forget to source the environment?" << endl;
+        std::cout << "Error " << exename << " not defined. Did you forget to source the environment?" << std::endl;
         exit(1);
     }
-    string command(cmdbuf);
+    std::string command(cmdbuf);
     free(cmdbuf);
     return command;
 }
 
 void setupccenv() {
     // Set-up library path
-    string libpath="LIB=";
+    std::string libpath="LIB=";
     char* libbuf;
     size_t liblen;
     _dupenv_s(&libbuf,&liblen,"ILIB");
@@ -46,12 +44,12 @@ void setupccenv() {
     libpath.append(libbuf);
     free(libbuf);
     if(_putenv(libpath.c_str())<0) {
-        cerr << "Error: could not export LIB" << endl;
+        std::cerr << "Error: could not export LIB" << std::endl;
         exit(1);
     }
 
     // Set-up include path
-    string includepath="INCLUDE=.";
+    std::string includepath="INCLUDE=.";
     char* incbuf;
     size_t inclen;
     _dupenv_s(&incbuf,&inclen,"SOLARINC");
@@ -59,13 +57,13 @@ void setupccenv() {
         std::cerr << "No environment variable SOLARINC" << std::endl;
         std::exit(EXIT_FAILURE);
     }
-    string inctmp(incbuf);
+    std::string inctmp(incbuf);
     free(incbuf);
 
     // 3 = strlen(" -I")
     for(size_t pos=0,len=0;pos<inctmp.length();) {
         size_t endpos=inctmp.find(" -I",pos+1);
-        if(endpos==string::npos)
+        if(endpos==std::string::npos)
             endpos=inctmp.length();
         len=endpos-pos;
 
@@ -79,12 +77,12 @@ void setupccenv() {
         pos=endpos;
     }
     if(_putenv(includepath.c_str())<0) {
-        cerr << "Error: could not export INCLUDE" << endl;
+        std::cerr << "Error: could not export INCLUDE" << std::endl;
         exit(1);
     }
 }
 
-string processccargs(vector<string> rawargs, string &env_prefix, bool &verbose)
+std::string processccargs(std::vector<std::string> rawargs, std::string &env_prefix, bool &verbose)
 {
     // default env var prefix
     env_prefix = "REAL_";
@@ -92,7 +90,7 @@ string processccargs(vector<string> rawargs, string &env_prefix, bool &verbose)
     bool env_prefix_next_arg = false;
 
     // suppress the msvc banner
-    string args=" -nologo";
+    std::string args=" -nologo";
     // TODO: should these options be enabled globally?
     args.append(" -EHsc");
     const char *const pDebugRuntime(getenv("MSVC_USE_DEBUG_RUNTIME"));
@@ -106,13 +104,13 @@ string processccargs(vector<string> rawargs, string &env_prefix, bool &verbose)
     // apparently these must be at the end
     // otherwise configure tests may fail
     // note: always use -debug so a PDB file is created
-    string linkargs(" -link -debug");
+    std::string linkargs(" -link -debug");
 
     // instead of using synced PDB access (-FS), use individual PDB files based on output
     const char *const pEnvIndividualPDBs(getenv("MSVC_USE_INDIVIDUAL_PDBS"));
     const bool bIndividualPDBs = (pEnvIndividualPDBs && !strcmp(pEnvIndividualPDBs, "TRUE"));
 
-    for(vector<string>::iterator i = rawargs.begin(); i != rawargs.end(); ++i) {
+    for(std::vector<std::string>::iterator i = rawargs.begin(); i != rawargs.end(); ++i) {
         if (env_prefix_next_arg)
         {
             env_prefix = *i;
@@ -140,21 +138,21 @@ string processccargs(vector<string> rawargs, string &env_prefix, bool &verbose)
                 linkargs.append(" -dll -out:");
                 linkargs.append(*i);
             }
-            else if (dot == string::npos)
+            else if (dot == std::string::npos)
             {
                 args.append("-Fe");
                 args.append(*i + ".exe");
             }
             else
             {
-                cerr << "unknown -o argument - please adapt gcc-wrapper for \""
-                     << (*i) << "\"" << endl;
+                std::cerr << "unknown -o argument - please adapt gcc-wrapper for \""
+                     << (*i) << "\"" << std::endl;
                 exit(1);
             }
 
             if (bIndividualPDBs)
             {
-                if (dot == string::npos)
+                if (dot == std::string::npos)
                     args.append(" -Fd" + *i + ".pdb");
                 else
                     args.append(" -Fd" + (*i).substr(0, dot) + ".pdb");
@@ -167,7 +165,7 @@ string processccargs(vector<string> rawargs, string &env_prefix, bool &verbose)
         }
         else if(!(*i).compare(0,2,"-D")) {
             // need to re-escape strings for preprocessor
-            for(size_t pos=(*i).find("\""); pos!=string::npos; pos=(*i).find("\"",pos)) {
+            for(size_t pos=(*i).find("\""); pos!=std::string::npos; pos=(*i).find("\"",pos)) {
                 (*i).replace(pos,0,"\\");
                 pos+=2;
             }
@@ -199,7 +197,7 @@ string processccargs(vector<string> rawargs, string &env_prefix, bool &verbose)
             size_t pos = i->find("=");
             if (0 == i->compare(0, pos, "--wrapper-env-prefix"))
             {
-                if (pos == string::npos)
+                if (pos == std::string::npos)
                     env_prefix_next_arg = true;
                 else if (pos + 1 == i->length())
                 {
@@ -217,7 +215,7 @@ string processccargs(vector<string> rawargs, string &env_prefix, bool &verbose)
 
     if (env_prefix_next_arg)
     {
-        cerr << "wrapper-env-prefix needs an argument!" << endl;
+        std::cerr << "wrapper-env-prefix needs an argument!" << std::endl;
         exit(1);
     }
 
@@ -225,7 +223,7 @@ string processccargs(vector<string> rawargs, string &env_prefix, bool &verbose)
     return args;
 }
 
-int startprocess(string command, string args, bool verbose)
+int startprocess(std::string command, std::string args, bool verbose)
 {
     STARTUPINFO si;
     PROCESS_INFORMATION pi;
@@ -242,7 +240,7 @@ int startprocess(string command, string args, bool verbose)
     sa.bInheritHandle=TRUE;
 
     if(!CreatePipe(&childout_read,&childout_write,&sa,0)) {
-        cerr << "Error: could not create stdout pipe" << endl;
+        std::cerr << "Error: could not create stdout pipe" << std::endl;
         exit(1);
     }
 
@@ -253,7 +251,7 @@ int startprocess(string command, string args, bool verbose)
 
     // support ccache
     size_t pos=command.find("ccache ");
-    if(pos != string::npos) {
+    if(pos != std::string::npos) {
         args.insert(0,"cl.exe");
         command=command.substr(0,pos+strlen("ccache"))+".exe";
     }
@@ -261,7 +259,7 @@ int startprocess(string command, string args, bool verbose)
     auto cmdline = "\"" + command + "\" " + args;
 
     if (verbose)
-        cerr << "CMD= " << command << " " << args << endl;
+        std::cerr << "CMD= " << command << " " << args << std::endl;
 
     // Commandline may be modified by CreateProcess
     char* cmdlineBuf=_strdup(cmdline.c_str());
@@ -278,7 +276,7 @@ int startprocess(string command, string args, bool verbose)
         &pi) // Process Information
         ) {
             auto const e = GetLastError();
-            cerr << "Error: could not create process \"" << cmdlineBuf << "\": " << e << endl;
+            std::cerr << "Error: could not create process \"" << cmdlineBuf << "\": " << e << std::endl;
             exit(1);
     }
 
@@ -295,7 +293,7 @@ int startprocess(string command, string args, bool verbose)
         if(GetLastError()==ERROR_BROKEN_PIPE)
             break;
         if(!success) {
-            cerr << "Error: could not read from subprocess stdout" << endl;
+            std::cerr << "Error: could not read from subprocess stdout" << std::endl;
             exit(1);
         }
         if(readlen!=0) {
diff --git a/soltools/mkdepend/collectdircontent.cxx b/soltools/mkdepend/collectdircontent.cxx
index 7ea5fa272de9..c5e910c2e7bf 100644
--- a/soltools/mkdepend/collectdircontent.cxx
+++ b/soltools/mkdepend/collectdircontent.cxx
@@ -2,22 +2,20 @@
 #include "collectdircontent.hxx"
 #include <rtl/character.hxx>
 
-using namespace std;
-
-PathFilePair IncludesCollection::split_path(const string& filePath) {
-    string sepU = "/";
-    string sepW = "\\";
-    string::size_type pos = filePath.rfind (sepU);
-    string::size_type posW = filePath.rfind (sepW);
-    if ((posW != string::npos) && ((posW > pos) || (pos == string::npos))) pos = posW;
-    if (pos != string::npos) {
-        string dirName = filePath.substr(0, pos);
+PathFilePair IncludesCollection::split_path(const std::string& filePath) {
+    std::string sepU = "/";
+    std::string sepW = "\\";
+    std::string::size_type pos = filePath.rfind (sepU);
+    std::string::size_type posW = filePath.rfind (sepW);
+    if ((posW != std::string::npos) && ((posW > pos) || (pos == std::string::npos))) pos = posW;
+    if (pos != std::string::npos) {
+        std::string dirName = filePath.substr(0, pos);
         return PathFilePair(dirName, filePath.substr(pos + 1, filePath.length()));
     } else
         return PathFilePair(".", filePath);
 }
 
-void IncludesCollection::add_to_collection(const string& dirPath) {
+void IncludesCollection::add_to_collection(const std::string& dirPath) {
     DirContent dirContent;
 #if defined(_WIN32)
     WIN32_FIND_DATA FindFileData;
@@ -29,7 +27,7 @@ void IncludesCollection::add_to_collection(const string& dirPath) {
         return;
     }
     do {
-        string winFileName(FindFileData.cFileName);
+        std::string winFileName(FindFileData.cFileName);
         transform(
             winFileName.begin(), winFileName.end(), winFileName.begin(),
             [](char c) {
@@ -54,7 +52,7 @@ void IncludesCollection::add_to_collection(const string& dirPath) {
     allIncludes.insert(EntriesPair(dirPath, dirContent));
 }
 
-bool IncludesCollection::exists(string filePath) {
+bool IncludesCollection::exists(std::string filePath) {
 #if defined(_WIN32)
     transform(
         filePath.begin(), filePath.end(), filePath.begin(),
@@ -63,8 +61,8 @@ bool IncludesCollection::exists(string filePath) {
         });
 #endif // defined( _WIN32 )
     PathFilePair dirFile = split_path(filePath);
-    string dirPath = dirFile.first;
-    string fileName = dirFile.second;
+    std::string dirPath = dirFile.first;
+    std::string fileName = dirFile.second;
     DirMap::iterator mapIter = allIncludes.find(dirPath);
     if (mapIter == allIncludes.end()) {
         add_to_collection(dirPath);
diff --git a/stoc/source/namingservice/namingservice.cxx b/stoc/source/namingservice/namingservice.cxx
index b600ab9c6794..acabb7370c6b 100644
--- a/stoc/source/namingservice/namingservice.cxx
+++ b/stoc/source/namingservice/namingservice.cxx
@@ -30,7 +30,6 @@
 
 using namespace cppu;
 using namespace osl;
-using namespace std;
 
 using namespace css::uno;
 using namespace css::lang;
diff --git a/stoc/source/servicemanager/servicemanager.cxx b/stoc/source/servicemanager/servicemanager.cxx
index d63a45abbfee..e38b9db609ae 100644
--- a/stoc/source/servicemanager/servicemanager.cxx
+++ b/stoc/source/servicemanager/servicemanager.cxx
@@ -64,7 +64,6 @@ using namespace css::lang;
 using namespace css::container;
 using namespace cppu;
 using namespace osl;
-using namespace std;
 
 namespace {
 
@@ -1123,7 +1122,7 @@ void OServiceManager::remove( const Any & Element )
     const Sequence< OUString > aServiceNames = xSF->getSupportedServiceNames();
     for( const OUString& rServiceName : aServiceNames )
     {
-        pair<HashMultimap_OWString_Interface::iterator, HashMultimap_OWString_Interface::iterator> p =
+        std::pair<HashMultimap_OWString_Interface::iterator, HashMultimap_OWString_Interface::iterator> p =
             m_ServiceMap.equal_range( rServiceName );
 
         while( p.first != p.second )
diff --git a/stoc/test/javavm/jvm_interaction/interactionhandler.cxx b/stoc/test/javavm/jvm_interaction/interactionhandler.cxx
index b8dd3819cc52..b82ef594afda 100644
--- a/stoc/test/javavm/jvm_interaction/interactionhandler.cxx
+++ b/stoc/test/javavm/jvm_interaction/interactionhandler.cxx
@@ -49,7 +49,6 @@
 #include <cppuhelper/implbase.hxx>
 #include <uno/current_context.hxx>
 
-using namespace std;
 using namespace cppu;
 using namespace css::uno;
 using namespace css::lang;
diff --git a/stoc/test/javavm/testjavavm.cxx b/stoc/test/javavm/testjavavm.cxx
index f89cd8cd315b..0e243f62d339 100644
--- a/stoc/test/javavm/testjavavm.cxx
+++ b/stoc/test/javavm/testjavavm.cxx
@@ -36,7 +36,6 @@
 #include <com/sun/star/registry/XImplementationRegistration.hpp>
 #include <com/sun/star/java/XJavaThreadRegister_11.hpp>
 
-using namespace std;
 using namespace cppu;
 using namespace css::uno;
 using namespace css::lang;
diff --git a/svl/source/numbers/zformat.cxx b/svl/source/numbers/zformat.cxx
index cac944b321c4..c7364e4bc995 100644
--- a/svl/source/numbers/zformat.cxx
+++ b/svl/source/numbers/zformat.cxx
@@ -2370,8 +2370,6 @@ OUString SvNumberformat::GetIntegerFractionDelimiterString( sal_uInt16 nNumFor )
 
 bool SvNumberformat::GetOutputString(double fNumber, sal_uInt16 nCharCount, OUString& rOutString) const
 {
-    using namespace std;
-
     if (eType != SvNumFormatType::NUMBER)
     {
         return false;
diff --git a/svtools/source/control/ruler.cxx b/svtools/source/control/ruler.cxx
index f17d60a03765..c4af43b1d267 100644
--- a/svtools/source/control/ruler.cxx
+++ b/svtools/source/control/ruler.cxx
@@ -35,7 +35,6 @@
 #include <memory>
 #include <vector>
 
-using namespace std;
 using namespace ::com::sun::star;
 using namespace ::com::sun::star::uno;
 using namespace ::com::sun::star::lang;
@@ -96,10 +95,10 @@ class ImplRulerData
     friend class Ruler;
 
 private:
-    vector<RulerLine>    pLines;
-    vector<RulerBorder>  pBorders;
-    vector<RulerIndent>  pIndents;
-    vector<RulerTab>     pTabs;
+    std::vector<RulerLine>    pLines;
+    std::vector<RulerBorder>  pBorders;
+    std::vector<RulerIndent>  pIndents;
+    std::vector<RulerTab>     pTabs;
 
     tools::Long       nNullVirOff;
     tools::Long       nRulVirOff;
@@ -2501,7 +2500,7 @@ void Ruler::SetLines( sal_uInt32 aLineArraySize, const RulerLine* pLineArray )
     if ( mpData->pLines.size() == aLineArraySize )
     {
         sal_uInt32           i = aLineArraySize;
-        vector<RulerLine>::const_iterator aItr1 = mpData->pLines.begin();
+        std::vector<RulerLine>::const_iterator aItr1 = mpData->pLines.begin();
         const RulerLine* pAry2 = pLineArray;
         while ( i )
         {
@@ -2644,7 +2643,7 @@ void Ruler::SetTabs( sal_uInt32 aTabArraySize, const RulerTab* pTabArray )
         else
         {
             sal_uInt32 i = aTabArraySize;
-            vector<RulerTab>::iterator aTabIterator = mpData->pTabs.begin();
+            std::vector<RulerTab>::iterator aTabIterator = mpData->pTabs.begin();
             const RulerTab* pInputArray = pTabArray;
             while ( i )
             {
diff --git a/svtools/source/dialogs/ServerDetailsControls.cxx b/svtools/source/dialogs/ServerDetailsControls.cxx
index b4afe9bb2d5c..52635afe2771 100644
--- a/svtools/source/dialogs/ServerDetailsControls.cxx
+++ b/svtools/source/dialogs/ServerDetailsControls.cxx
@@ -26,7 +26,6 @@
 
 #include "ServerDetailsControls.hxx"
 
-using namespace std;
 using namespace com::sun::star::sdbc;
 using namespace com::sun::star::task;
 using namespace com::sun::star::ucb;
diff --git a/toolkit/source/controls/eventcontainer.cxx b/toolkit/source/controls/eventcontainer.cxx
index 04aeaf2bfc42..1b57e984d761 100644
--- a/toolkit/source/controls/eventcontainer.cxx
+++ b/toolkit/source/controls/eventcontainer.cxx
@@ -29,8 +29,6 @@ using namespace com::sun::star::container;
 using namespace com::sun::star::registry;
 using namespace com::sun::star::script;
 using namespace cppu;
-using namespace std;
-
 
 namespace toolkit
 {