diff --git a/qse/cmd/awk/awk.c b/qse/cmd/awk/awk.c
index f5d1e999..b0a35901 100644
--- a/qse/cmd/awk/awk.c
+++ b/qse/cmd/awk/awk.c
@@ -160,7 +160,7 @@ static void stop_run (void* arg)
 	int e = errno;
 #endif
 
-	qse_awk_rtx_stop (app_rtx);
+	qse_awk_rtx_halt (app_rtx);
 
 #if !defined(_WIN32) && !defined(__OS2__) && !defined(__DOS__)
 	errno = e;
diff --git a/qse/cmd/sed/sed.c b/qse/cmd/sed/sed.c
index 70c0e2d8..cfe42713 100644
--- a/qse/cmd/sed/sed.c
+++ b/qse/cmd/sed/sed.c
@@ -493,7 +493,7 @@ static void stop_run (void* arg)
 	int e = errno;
 #endif
 
-	qse_sed_stop (g_sed);
+	qse_sed_halt (g_sed);
 
 #if !defined(_WIN32) && !defined(__OS2__) && !defined(__DOS__)
 	errno = e;
@@ -879,7 +879,7 @@ static int sed_main (int argc, qse_char_t* argv[])
 				QSE_MMGR_FREE (qse_sed_getmmgr(sed), tmpl_tmpfile);
 			}
 
-			if (qse_sed_isstop (sed)) break;
+			if (qse_sed_ishalt (sed)) break;
 		}
 
 		if (output) qse_sio_close (output->u.sio);
diff --git a/qse/include/qse/awk/Awk.hpp b/qse/include/qse/awk/Awk.hpp
index a385b24d..5c207e76 100644
--- a/qse/include/qse/awk/Awk.hpp
+++ b/qse/include/qse/awk/Awk.hpp
@@ -861,8 +861,8 @@ public:
 		operator Awk* () const;
 		operator rtx_t* () const;
 
-		void stop () const;
-		bool isStop () const;
+		void halt () const;
+		bool isHalt () const;
 
 		errnum_t getErrorNumber () const;
 		loc_t getErrorLocation () const;
@@ -1047,9 +1047,9 @@ public:
 	);
 
 	///
-	/// The stop() function makes request to abort execution
+	/// The halt() function makes request to abort execution
 	///
-	void stop ();
+	void halt ();
 	/// \}
 
 	///
diff --git a/qse/include/qse/awk/awk.h b/qse/include/qse/awk/awk.h
index 1b1e2c3b..c3f5e2e5 100644
--- a/qse/include/qse/awk/awk.h
+++ b/qse/include/qse/awk/awk.h
@@ -2344,26 +2344,26 @@ QSE_EXPORT qse_awk_val_t* qse_awk_rtx_callwithstrs (
 );
 
 /**
- * The qse_awk_stopall() function aborts all active runtime contexts
+ * The qse_awk_haltall() function aborts all active runtime contexts
  * associated with \a awk.
  */
-QSE_EXPORT void qse_awk_stopall (
+QSE_EXPORT void qse_awk_haltall (
 	qse_awk_t* awk /**< awk */
 );
 
 /**
- * The qse_awk_rtx_isstop() function tests if qse_awk_rtx_stop() has been 
+ * The qse_awk_rtx_ishalt() function tests if qse_awk_rtx_halt() has been 
  * called.
  */
-QSE_EXPORT int qse_awk_rtx_isstop (
+QSE_EXPORT int qse_awk_rtx_ishalt (
 	qse_awk_rtx_t* rtx /**< runtime context */
 );
 
 /**
- * The qse_awk_rtx_stop() function causes an active runtime context \a rtx to 
+ * The qse_awk_rtx_halt() function causes an active runtime context \a rtx to 
  * be aborted. 
  */
-QSE_EXPORT void qse_awk_rtx_stop (
+QSE_EXPORT void qse_awk_rtx_halt (
 	qse_awk_rtx_t* rtx /**< runtime context */
 );
 
diff --git a/qse/include/qse/sed/Sed.hpp b/qse/include/qse/sed/Sed.hpp
index 7aceba44..192ad5ae 100644
--- a/qse/include/qse/sed/Sed.hpp
+++ b/qse/include/qse/sed/Sed.hpp
@@ -201,17 +201,17 @@ public:
 	int execute (Stream& iostream);
 
 	///
-	/// The stop() function makes a request to break a running loop
+	/// The halt() function makes a request to break a running loop
 	/// inside execute(). Note that this does not affect blocking 
 	/// operations in user-defined stream handlers.
 	///
-	void stop ();
+	void halt ();
 
 	///
-	/// The isStop() function returns true if stop() has been called
+	/// The isHalt() function returns true if halt() has been called
 	/// since the last call to execute(), false otherwise.
 	///
-	bool isStop () const;
+	bool isHalt () const;
 
 	///
 	/// The getTrait() function gets the current traits.
diff --git a/qse/include/qse/sed/sed.h b/qse/include/qse/sed/sed.h
index 1e79cf45..32b31967 100644
--- a/qse/include/qse/sed/sed.h
+++ b/qse/include/qse/sed/sed.h
@@ -644,17 +644,17 @@ QSE_EXPORT int qse_sed_exec (
 );
 
 /**
- * The qse_sed_stop() function breaks running loop in qse_sed_exec().
+ * The qse_sed_halt() function breaks running loop in qse_sed_exec().
  * It doesn't affect blocking calls in stream handlers.
  */
-QSE_EXPORT void qse_sed_stop (
+QSE_EXPORT void qse_sed_halt (
 	qse_sed_t* sed   /**< stream editor */
 );
 
 /**
- * The qse_sed_isstop() functions tests if qse_sed_stop() is called.
+ * The qse_sed_ishalt() functions tests if qse_sed_halt() is called.
  */
-QSE_EXPORT int qse_sed_isstop (
+QSE_EXPORT int qse_sed_ishalt (
 	qse_sed_t* sed   /**< stream editor */
 );
 	
diff --git a/qse/include/qse/si/TcpServer.hpp b/qse/include/qse/si/TcpServer.hpp
index bf60faec..330163b0 100644
--- a/qse/include/qse/si/TcpServer.hpp
+++ b/qse/include/qse/si/TcpServer.hpp
@@ -47,8 +47,8 @@ public:
 	TcpServer (Mmgr* mmgr = QSE_NULL) QSE_CPP_NOEXCEPT;
 	virtual ~TcpServer () QSE_CPP_NOEXCEPT;
 
-	virtual int start (const qse_char_t* addrs) QSE_CPP_NOEXCEPT;
-	virtual int stop () QSE_CPP_NOEXCEPT;
+	virtual int execute (const qse_char_t* addrs) QSE_CPP_NOEXCEPT;
+	virtual int halt () QSE_CPP_NOEXCEPT;
 
 	bool isServing () const QSE_CPP_NOEXCEPT
 	{ 
@@ -57,11 +57,11 @@ public:
 
 	bool isStopRequested () const QSE_CPP_NOEXCEPT
 	{
-		return this->_stop_requested;
+		return this->_halt_requested;
 	}
 	void setStopRequested (bool req) QSE_CPP_NOEXCEPT
 	{
-		this->_stop_requested = req;
+		this->_halt_requested = req;
 	}
 
 	qse_size_t getMaxConnections () const QSE_CPP_NOEXCEPT
@@ -117,7 +117,7 @@ public:
 		Connection (Listener* listener) QSE_CPP_NOEXCEPT: listener(listener), prev_connection(QSE_NULL), next_connection(QSE_NULL), claimed(false), wid(_wid_map_t::WID_INVALID) {}
 
 		int main ();
-		int stop () QSE_CPP_NOEXCEPT;
+		int halt () QSE_CPP_NOEXCEPT;
 
 		Listener* getListener() QSE_CPP_NOEXCEPT { return this->listener; }
 		const Listener* getListener() const QSE_CPP_NOEXCEPT { return this->listener; }
@@ -140,7 +140,7 @@ public:
 
 		QSE::Socket socket;
 		QSE::SocketAddress address;
-		QSE::SpinLock csspl; // spin lock for connection stop 
+		QSE::SpinLock csspl; // spin lock for connection halt 
 	};
 
 private:
@@ -238,7 +238,7 @@ private:
 	ListenerList   _listener_list;
 	ConnectionList _connection_list[2];
 	QSE::SpinLock  _connection_list_spl;
-	bool           _stop_requested;
+	bool           _halt_requested;
 	bool           _server_serving;
 	qse_size_t     _max_connections;
 	qse_size_t     _thread_stack_size;
diff --git a/qse/lib/awk/Awk.cpp b/qse/lib/awk/Awk.cpp
index c89a3bcd..eda85aa4 100644
--- a/qse/lib/awk/Awk.cpp
+++ b/qse/lib/awk/Awk.cpp
@@ -1099,16 +1099,16 @@ Awk::Run::operator Awk::rtx_t* () const
 	return this->rtx;
 }
 
-void Awk::Run::stop () const 
+void Awk::Run::halt () const 
 {
 	QSE_ASSERT (this->rtx != QSE_NULL);
-	qse_awk_rtx_stop (this->rtx);
+	qse_awk_rtx_halt (this->rtx);
 }
 
-bool Awk::Run::isStop () const
+bool Awk::Run::isHalt () const
 {
 	QSE_ASSERT (this->rtx != QSE_NULL);
-	return qse_awk_rtx_isstop (this->rtx)? true: false;
+	return qse_awk_rtx_ishalt (this->rtx)? true: false;
 }
 
 Awk::errnum_t Awk::Run::getErrorNumber () const 
@@ -1576,10 +1576,10 @@ int Awk::call (const qse_wchar_t* name, Value* ret, const Value* args, size_t na
 	return 0;
 }
 
-void Awk::stop () 
+void Awk::halt () 
 {
 	QSE_ASSERT (awk != QSE_NULL);
-	qse_awk_stopall (awk);
+	qse_awk_haltall (awk);
 }
 
 int Awk::init_runctx () 
diff --git a/qse/lib/awk/awk-prv.h b/qse/lib/awk/awk-prv.h
index 0b5b09ff..02a298cc 100644
--- a/qse/lib/awk/awk-prv.h
+++ b/qse/lib/awk/awk-prv.h
@@ -311,7 +311,7 @@ struct qse_awk_t
 	qse_mchar_t merrmsg[QSE_AWK_ERRINF_MSG_SIZE * 2];
 #endif
 
-	int stopall;
+	int haltall;
 	qse_awk_ecb_t* ecb;
 
 	qse_rbt_t* modtab;
diff --git a/qse/lib/awk/awk.c b/qse/lib/awk/awk.c
index 227d3c8e..931975a6 100644
--- a/qse/lib/awk/awk.c
+++ b/qse/lib/awk/awk.c
@@ -155,7 +155,7 @@ int qse_awk_init (qse_awk_t* awk, qse_mmgr_t* mmgr, const qse_awk_prm_t* prm)
 	awk->errinf.loc.colm = 0;
 	awk->errinf.loc.file = QSE_NULL;
 	awk->errstr = qse_awk_dflerrstr;
-	awk->stopall = 0;
+	awk->haltall = 0;
 
 	/* progagate the primitive functions */
 	QSE_ASSERT (prm             != QSE_NULL);
@@ -327,7 +327,7 @@ void qse_awk_clear (qse_awk_t* awk)
 		if (ecb->clear) ecb->clear (awk);
 	}
 
-	awk->stopall = 0;
+	awk->haltall = 0;
 
 	clear_token (&awk->tok);
 	clear_token (&awk->ntok);
@@ -525,9 +525,9 @@ int qse_awk_getopt (qse_awk_t* awk, qse_awk_opt_t id, void* value)
 	return -1;
 }
 
-void qse_awk_stopall (qse_awk_t* awk)
+void qse_awk_haltall (qse_awk_t* awk)
 {
-	awk->stopall = 1;
+	awk->haltall = 1;
 	qse_awk_seterrnum (awk, QSE_AWK_EINVAL, QSE_NULL);
 }
 
diff --git a/qse/lib/awk/run.c b/qse/lib/awk/run.c
index 81c9a796..a86da1a5 100644
--- a/qse/lib/awk/run.c
+++ b/qse/lib/awk/run.c
@@ -851,14 +851,14 @@ void qse_awk_rtx_close (qse_awk_rtx_t* rtx)
 	qse_awk_freemem (rtx->awk, rtx);
 }
 
-void qse_awk_rtx_stop (qse_awk_rtx_t* rtx)
+void qse_awk_rtx_halt (qse_awk_rtx_t* rtx)
 {
 	rtx->exit_level = EXIT_ABORT;
 }
 
-int qse_awk_rtx_isstop (qse_awk_rtx_t* rtx)
+int qse_awk_rtx_ishalt (qse_awk_rtx_t* rtx)
 {
-	return (rtx->exit_level == EXIT_ABORT || rtx->awk->stopall);
+	return (rtx->exit_level == EXIT_ABORT || rtx->awk->haltall);
 }
 
 void qse_awk_rtx_getrio (qse_awk_rtx_t* rtx, qse_awk_rio_t* rio)
@@ -1436,7 +1436,7 @@ static qse_awk_val_t* run_bpae_loop (qse_awk_rtx_t* rtx)
 	}
 
 	/* execute END blocks. the first END block is executed if the 
-	 * program is not explicitly aborted with qse_awk_rtx_stop().*/
+	 * program is not explicitly aborted with qse_awk_rtx_halt().*/
 	for (nde = rtx->awk->tree.end;
 	     ret == 0 && nde != QSE_NULL && rtx->exit_level < EXIT_ABORT;
 	     nde = nde->next) 
@@ -1574,7 +1574,7 @@ qse_awk_val_t* qse_awk_rtx_callfun (qse_awk_rtx_t* rtx, qse_awk_fun_t* fun, qse_
 	if (rtx->exit_level >= EXIT_GLOBAL) 
 	{
 		/* cannot call the function again when exit() is called
-		 * in an AWK program or qse_awk_rtx_stop() is invoked */
+		 * in an AWK program or qse_awk_rtx_halt() is invoked */
 		SETERR_COD (rtx, QSE_AWK_EPERM);
 		return QSE_NULL;
 	}
@@ -1950,7 +1950,7 @@ static int run_block (qse_awk_rtx_t* rtx, qse_awk_nde_blk_t* nde)
 
 #define ON_STATEMENT(rtx,nde) QSE_BLOCK ( \
 	qse_awk_rtx_ecb_t* ecb; \
-	if ((rtx)->awk->stopall) (rtx)->exit_level = EXIT_ABORT; \
+	if ((rtx)->awk->haltall) (rtx)->exit_level = EXIT_ABORT; \
 	for (ecb = (rtx)->ecb; ecb; ecb = ecb->next) \
 		if (ecb->stmt) ecb->stmt (rtx, nde);  \
 )
diff --git a/qse/lib/sed/Sed.cpp b/qse/lib/sed/Sed.cpp
index b28e8267..e263428a 100644
--- a/qse/lib/sed/Sed.cpp
+++ b/qse/lib/sed/Sed.cpp
@@ -90,16 +90,16 @@ int Sed::execute (Stream& iostream)
 	return qse_sed_exec (sed, xin, xout);
 }
 
-void Sed::stop ()
+void Sed::halt ()
 {
 	QSE_ASSERT (sed != QSE_NULL);
-	qse_sed_stop (sed);
+	qse_sed_halt (sed);
 }
 
-bool Sed::isStop () const
+bool Sed::isHalt () const
 {
 	QSE_ASSERT (sed != QSE_NULL);
-	return qse_sed_isstop (sed);
+	return qse_sed_ishalt (sed);
 }
 
 int Sed::getTrait () const
diff --git a/qse/lib/sed/sed-prv.h b/qse/lib/sed/sed-prv.h
index 4c90f053..7655f012 100644
--- a/qse/lib/sed/sed-prv.h
+++ b/qse/lib/sed/sed-prv.h
@@ -217,8 +217,8 @@ struct qse_sed_t
 		int subst_done;
 		void* last_rex;	
 
-		/** stop requested */
-		int stopreq;
+		/** halt requested */
+		int haltreq;
 	} e;
 };
 
diff --git a/qse/lib/sed/sed.c b/qse/lib/sed/sed.c
index 5ea8c758..c32cc390 100644
--- a/qse/lib/sed/sed.c
+++ b/qse/lib/sed/sed.c
@@ -3953,7 +3953,7 @@ int qse_sed_exec (qse_sed_t* sed, qse_sed_io_impl_t inf, qse_sed_io_impl_t outf)
 #endif
 	};
 
-	sed->e.stopreq = 0;
+	sed->e.haltreq = 0;
 	sed->e.last_rex = QSE_NULL;
 
 	sed->e.subst_done = 0;
@@ -4020,7 +4020,7 @@ int qse_sed_exec (qse_sed_t* sed, qse_sed_io_impl_t inf, qse_sed_io_impl_t outf)
 		goto done;
 	}
 
-	while (!sed->e.stopreq)
+	while (!sed->e.haltreq)
 	{
 #if defined(QSE_ENABLE_SED_TRACER)
 		if (sed->opt.tracer) sed->opt.tracer (sed, QSE_SED_TRACER_READ, QSE_NULL);
@@ -4068,7 +4068,7 @@ int qse_sed_exec (qse_sed_t* sed, qse_sed_io_impl_t inf, qse_sed_io_impl_t outf)
 					if (emit_output (sed, 0) <= -1) ret = -1;
 					goto done;
 				}
-				if (sed->e.stopreq) goto done;
+				if (sed->e.haltreq) goto done;
 				if (j == &sed->cmd.again) goto again;
 
 				/* go to the next command */
@@ -4093,14 +4093,14 @@ done3:
 	return ret;
 }
 
-void qse_sed_stop (qse_sed_t* sed)
+void qse_sed_halt (qse_sed_t* sed)
 {
-	sed->e.stopreq = 1;
+	sed->e.haltreq = 1;
 }
 
-int qse_sed_isstop (qse_sed_t* sed)
+int qse_sed_ishalt (qse_sed_t* sed)
 {
-	return sed->e.stopreq;
+	return sed->e.haltreq;
 }
 
 const qse_char_t* qse_sed_getcompid (qse_sed_t* sed)
diff --git a/qse/lib/si/TcpServer.cpp b/qse/lib/si/TcpServer.cpp
index 0951ae43..824b0298 100644
--- a/qse/lib/si/TcpServer.cpp
+++ b/qse/lib/si/TcpServer.cpp
@@ -72,7 +72,7 @@ int TcpServer::Connection::main ()
 	return n;
 }
 
-int TcpServer::Connection::stop () QSE_CPP_NOEXCEPT
+int TcpServer::Connection::halt () QSE_CPP_NOEXCEPT
 {
 	// the receiver will be notified of the end of 
 	// the connection by the socket's closing.
@@ -86,7 +86,7 @@ int TcpServer::Connection::stop () QSE_CPP_NOEXCEPT
 
 TcpServer::TcpServer (Mmgr* mmgr) QSE_CPP_NOEXCEPT: 
 	Mmged(mmgr),
-	_stop_requested(false), 
+	_halt_requested(false), 
 	_server_serving(false), 
 	_max_connections(0),
 	_thread_stack_size(0)
@@ -164,7 +164,7 @@ void TcpServer::dispatch_mux_event (qse_mux_t* mux, const qse_mux_evt_t* evt) QS
 
 	if (evt->data == NULL)
 	{
-		/* just consume data written by TcpServer::stop() */
+		/* just consume data written by TcpServer::halt() */
 		char tmp[128];
 		while (::read(server->_listener_list.mux_pipe[0], tmp, QSE_SIZEOF(tmp)) > 0) /* nothing */;
 	}
@@ -210,7 +210,7 @@ void TcpServer::dispatch_mux_event (qse_mux_t* mux, const qse_mux_evt_t* evt) QS
 			if (lerr == Socket::E_EINTR || lerr == Socket::E_EAGAIN) return;
 
 			server->setErrorNumber (lerr);
-			server->stop ();
+			server->halt ();
 			return;
 		}
 
@@ -409,7 +409,7 @@ oops:
 	return -1;
 }
 
-int TcpServer::start (const qse_char_t* addrs) QSE_CPP_NOEXCEPT
+int TcpServer::execute (const qse_char_t* addrs) QSE_CPP_NOEXCEPT
 {
 	int xret = 0;
 
@@ -471,7 +471,7 @@ int TcpServer::start (const qse_char_t* addrs) QSE_CPP_NOEXCEPT
 	return xret;
 }
 
-int TcpServer::stop () QSE_CPP_NOEXCEPT
+int TcpServer::halt () QSE_CPP_NOEXCEPT
 {
 	if (this->_server_serving) 
 	{
diff --git a/qse/samples/awk/awk25.cpp b/qse/samples/awk/awk25.cpp
index 8389cc90..1b85bfe5 100644
--- a/qse/samples/awk/awk25.cpp
+++ b/qse/samples/awk/awk25.cpp
@@ -246,7 +246,7 @@ static int setsignal (int sig, void(*handler)(int), int restart)
 static void stop_run (int sig)
 {
 	int e = errno;
-	if (app_awk) app_awk->stop ();
+	if (app_awk) app_awk->halt ();
 	errno = e;
 }
 #endif
diff --git a/qse/samples/cry/sha01.c b/qse/samples/cry/sha01.c
index 9bdb8553..7541b248 100644
--- a/qse/samples/cry/sha01.c
+++ b/qse/samples/cry/sha01.c
@@ -200,7 +200,7 @@ int main (int argc, char* argv[])
 
 			case '?':
 			case ':':
-				print_usage (qse_basenameasmbs(argv[0]));
+				print_usage (qse_mbsbasename(argv[0]));
 				return -1;
 		}
 	}
diff --git a/qse/samples/si/tcpsvr01.cpp b/qse/samples/si/tcpsvr01.cpp
index a95fa45f..5f169568 100644
--- a/qse/samples/si/tcpsvr01.cpp
+++ b/qse/samples/si/tcpsvr01.cpp
@@ -71,7 +71,7 @@ public:
 				// TODO: don't call stop() if this processs is a guardian
 				//       though it's no harm to call stop().
 				QSE_APP_LOG3 (this, QSE_LOG_INFO, QSE_T("requesting to stop server...app %p server %p - pid %d\n"), this, &this->server, (int)getpid());
-				this->server.stop();
+				this->server.halt();
 				break;
 		}
 	}
@@ -100,7 +100,7 @@ public:
 			QSE_APP_LOG0 (this, QSE_LOG_INFO, QSE_T(" <tcpsvr01r> "));
 			QSE_APP_LOG0 (this, QSE_LOG_INFO, QSE_T("started\n"));
 			this->server.setThreadStackSize (256000);
-			return this->server.start (QSE_T("[::]:9998,0.0.0.0:9998"));
+			return this->server.execute(QSE_T("[::]:9998,0.0.0.0:9998"));
 		}
 		return -1;
 	}
diff --git a/qse/samples/si/tcpsvr02.cpp b/qse/samples/si/tcpsvr02.cpp
index ccb89c50..eb404dd0 100644
--- a/qse/samples/si/tcpsvr02.cpp
+++ b/qse/samples/si/tcpsvr02.cpp
@@ -107,16 +107,16 @@ static int test1 (void)
 
 	server.setThreadStackSize (256000);
 	g_server = &server;
-	//server.start (QSE_T("0.0.0.0:9998"));
-	server.start (QSE_T("[::]:9998,0.0.0.0:9998"));
-	//server.start (QSE_T("[fe80::1c4:a90d:a0f0:d52%wlan0]:9998,0.0.0.0:9998"));
+	//server.execute (QSE_T("0.0.0.0:9998"));
+	server.execute (QSE_T("[::]:9998,0.0.0.0:9998"));
+	//server.execute (QSE_T("[fe80::1c4:a90d:a0f0:d52%wlan0]:9998,0.0.0.0:9998"));
 	g_server = QSE_NULL;
 	return 0;
 }
 
 static void handle_sigint (int sig)
 {
-	if (g_server) g_server->stop ();
+	if (g_server) g_server->halt ();
 }
 
 int main ()