diff --git a/BOB.cpp b/BOB.cpp
index 0a908ad2..55d14293 100644
--- a/BOB.cpp
+++ b/BOB.cpp
@@ -16,6 +16,12 @@ namespace client
 	{
 	}
 
+	void BOBCommandSession::Terminate ()
+	{
+		m_Socket.close ();
+		m_IsOpen = false;	
+	}
+
 	void BOBCommandSession::Receive ()
 	{
 		m_Socket.async_read_some (boost::asio::buffer(m_ReceiveBuffer + m_ReceiveBufferOffset, BOB_COMMAND_BUFFER_SIZE - m_ReceiveBufferOffset),                
@@ -26,7 +32,10 @@ namespace client
 	void BOBCommandSession::HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred)
 	{
 		if (ecode)
+		{
 			LogPrint ("BOB command channel read error: ", ecode.message ());
+			Terminate ();
+		}	
 		else
 		{	
 			size_t size = m_ReceiveBufferOffset + bytes_transferred; 
@@ -55,18 +64,67 @@ namespace client
 				else
 				{
 					LogPrint (eLogError, "Malformed input of the BOB command channel");
-					return;
+					Terminate ();
 				}
 			}	
+		}
+	}
+
+	void BOBCommandSession::Send (size_t len)
+	{
+		boost::asio::async_write (m_Socket, boost::asio::buffer (m_SendBuffer, len), 
+			boost::asio::transfer_all (),
+			std::bind(&BOBCommandSession::HandleSent, shared_from_this (), 
+				std::placeholders::_1, std::placeholders::_2));
+	}
+
+	void BOBCommandSession::HandleSent (const boost::system::error_code& ecode, std::size_t bytes_transferred)
+	{
+		if (ecode)
+        {
+			LogPrint ("BOB command channel send error: ", ecode.message ());
+			Terminate ();
+		}
+		else
+		{
 			if (m_IsOpen)
 				Receive ();
+			else
+				Terminate ();	
 		}
 	}
 
+	void BOBCommandSession::SendReplyOK (const char * msg)
+	{
+#ifdef _MSC_VER
+		size_t len = sprintf_s (m_SendBuffer, BOB_COMMAND_BUFFER_SIZE, BOB_REPLY_OK, msg);
+#else		
+		size_t len = snprintf (m_SendBuffer, BOB_COMMAND_BUFFER_SIZE, BOB_REPLY_OK, msg);
+#endif
+		Send (len);
+	}
+
+	void BOBCommandSession::SendReplyError (const char * msg)
+	{
+#ifdef _MSC_VER
+		size_t len = sprintf_s (m_SendBuffer, BOB_COMMAND_BUFFER_SIZE, BOB_REPLY_ERROR, msg);
+#else		
+		size_t len = snprintf (m_SendBuffer, BOB_COMMAND_BUFFER_SIZE, BOB_REPLY_ERROR, msg);
+#endif
+		Send (len);	
+	}
+
 	void BOBCommandSession::ZapCommandHandler (const char * operand, size_t len)
 	{
 		LogPrint (eLogDebug, "BOB: zap");
+		Terminate ();
+	}
+
+	void BOBCommandSession::QuitCommandHandler (const char * operand, size_t len)
+	{
+		LogPrint (eLogDebug, "BOB: quit");
 		m_IsOpen = false;
+		SendReplyOK ("Bye!");
 	}
 
 	BOBCommandChannel::BOBCommandChannel (int port):
@@ -74,6 +132,7 @@ namespace client
 		m_Acceptor (m_Service, boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), port))
 	{
 		m_CommandHandlers[BOB_COMMAND_ZAP] = &BOBCommandSession::ZapCommandHandler; 
+		m_CommandHandlers[BOB_COMMAND_QUIT] = &BOBCommandSession::QuitCommandHandler;
 	}
 
 	BOBCommandChannel::~BOBCommandChannel ()
diff --git a/BOB.h b/BOB.h
index 25407058..d653a997 100644
--- a/BOB.h
+++ b/BOB.h
@@ -15,6 +15,10 @@ namespace client
 {
 	const size_t BOB_COMMAND_BUFFER_SIZE = 1024;
 	const char BOB_COMMAND_ZAP[] = "zap";
+	const char BOB_COMMAND_QUIT[] = "quit";		
+
+	const char BOB_REPLY_OK[] = "OK %s\n";
+	const char BOB_REPLY_ERROR[] = "ERROR %s\n";
 
 	class BOBCommandChannel;
 	class BOBCommandSession: public std::enable_shared_from_this<BOBCommandSession>
@@ -23,19 +27,29 @@ namespace client
 
 			BOBCommandSession (BOBCommandChannel& owner);
 			~BOBCommandSession ();	
+			void Terminate ();
 
 			boost::asio::ip::tcp::socket& GetSocket () { return m_Socket; };
 			void Receive ();
-			void HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred);
 
 			// command handlers
 			void ZapCommandHandler (const char * operand, size_t len);
+			void QuitCommandHandler (const char * operand, size_t len);
+
+		private:
+
+			void HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred);
+
+			void Send (size_t len);
+			void HandleSent (const boost::system::error_code& ecode, std::size_t bytes_transferred);
+			void SendReplyOK (const char * msg);
+			void SendReplyError (const char * msg);
 
 		private:
 
 			BOBCommandChannel& m_Owner;
 			boost::asio::ip::tcp::socket m_Socket;
-			char m_ReceiveBuffer[BOB_COMMAND_BUFFER_SIZE + 1];
+			char m_ReceiveBuffer[BOB_COMMAND_BUFFER_SIZE + 1], m_SendBuffer[BOB_COMMAND_BUFFER_SIZE + 1];
 			size_t m_ReceiveBufferOffset;
 			bool m_IsOpen;
 	};