diff --git a/CMakeLists.txt b/CMakeLists.txt
index b2626740..4a8eaa69 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,14 +9,6 @@ OPTION(DISABLE_IOSTREAM "Disables <iostream> (cout) support for embedded applica
 SET(CMAKE_CXX_STANDARD 14)
 SET(CMAKE_CXX_STANDARD_REQUIRED TRUE)
 
-if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
-	# enable parallel build
-	set( ENV{CL} /MP )
-elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
-	# Increase warning levels
-	add_compile_options(-Wall -Wextra -pedantic)
-endif()
-
 # header-only library target. To use this project as a subdirectory,
 # add the following to your code:
 #
@@ -26,6 +18,15 @@ add_library(${PROJECT_NAME} INTERFACE)
 target_sources(${PROJECT_NAME} INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/include/units.h)
 target_include_directories(${PROJECT_NAME} INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/include)
 
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+	# enable parallel build
+	set( ENV{CL} /MP )
+	target_compile_definitions(${PROJECT_NAME} INTERFACE "/permissive-")
+elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+	# Increase warning levels
+	add_compile_options(-Wall -Wextra -pedantic)
+endif()
+
 # Remove IOStream from the library (useful for embdedded development)
 if(DISABLE_IOSTREAM)
 	target_compile_definitions(${PROJECT_NAME} INTERFACE -DUNIT_LIB_DISABLE_IOSTREAM)
diff --git a/include/units.h b/include/units.h
index 7856a44b..c62921ba 100644
--- a/include/units.h
+++ b/include/units.h
@@ -150,9 +150,12 @@
 	#define UNIT_ADD_IO(namespaceName, nameSingular, abbreviation)
 #else
 	#define UNIT_ADD_IO(namespaceName, nameSingular, abbreviation)\
-	inline std::ostream& operator<<(std::ostream& os, const namespaceName::nameSingular ## _t& obj) \
+	namespace namespaceName\
 	{\
-		os << obj() << " "#abbreviation; return os; \
+		inline std::ostream& operator<<(std::ostream& os, const nameSingular ## _t& obj) \
+		{\
+			os << obj() << " "#abbreviation; return os; \
+		}\
 	}
 #endif
 
@@ -612,6 +615,9 @@ namespace units
 		 * @details		A non-templated base class for `unit` which enables RTTI testing.
 		 */
 		struct _unit {};
+
+		template<std::intmax_t Num, std::intmax_t Den = 1>
+		using meter_ratio = std::ratio<Num, Den>;
 	}
 	/** @endcond */	// END DOXYGEN IGNORE
 
@@ -651,7 +657,7 @@ namespace units
 	 * @tparam		Byte		`std::ratio` representing the exponent value for bytes.
 	 * @sa			category	 for type aliases for SI base_unit types.
 	 */
-	template<class Meter = std::ratio<0>,
+	template<class Meter = detail::meter_ratio<0>,
 	class Kilogram = std::ratio<0>,
 	class Second = std::ratio<0>,
 	class Radian = std::ratio<0>,
@@ -699,47 +705,47 @@ namespace units
 
 		// SI BASE UNIT TYPES
 		//					METERS			KILOGRAMS		SECONDS			RADIANS			AMPERES			KELVIN			MOLE			CANDELA			BYTE		---		CATEGORY
-		typedef base_unit<std::ratio<1>>																																		length_unit;			 		///< Represents an SI base unit of length
-		typedef base_unit<std::ratio<0>,	std::ratio<1>>																														mass_unit;				 		///< Represents an SI base unit of mass
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<1>>																										time_unit;				 		///< Represents an SI base unit of time
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>																						angle_unit;				 		///< Represents an SI base unit of angle
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>																		current_unit;			 		///< Represents an SI base unit of current
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>														temperature_unit;		 		///< Represents an SI base unit of temperature
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>										substance_unit;			 		///< Represents an SI base unit of amount of substance
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>						luminous_intensity_unit; 		///< Represents an SI base unit of luminous intensity
+		typedef base_unit<detail::meter_ratio<1>>																																		length_unit;			 		///< Represents an SI base unit of length
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<1>>																														mass_unit;				 		///< Represents an SI base unit of mass
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<1>>																										time_unit;				 		///< Represents an SI base unit of time
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>																						angle_unit;				 		///< Represents an SI base unit of angle
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>																		current_unit;			 		///< Represents an SI base unit of current
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>														temperature_unit;		 		///< Represents an SI base unit of temperature
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>										substance_unit;			 		///< Represents an SI base unit of amount of substance
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>						luminous_intensity_unit; 		///< Represents an SI base unit of luminous intensity
 
 		// SI DERIVED UNIT TYPES
 		//					METERS			KILOGRAMS		SECONDS			RADIANS			AMPERES			KELVIN			MOLE			CANDELA			BYTE		---		CATEGORY	
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<2>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>>						solid_angle_unit;				///< Represents an SI derived unit of solid angle
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<-1>>																										frequency_unit;					///< Represents an SI derived unit of frequency
-		typedef base_unit<std::ratio<1>,	std::ratio<0>,	std::ratio<-1>>																										velocity_unit;					///< Represents an SI derived unit of velocity
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<-1>,	std::ratio<1>>																						angular_velocity_unit;			///< Represents an SI derived unit of angular velocity
-		typedef base_unit<std::ratio<1>,	std::ratio<0>,	std::ratio<-2>>																										acceleration_unit;				///< Represents an SI derived unit of acceleration
-		typedef base_unit<std::ratio<1>,	std::ratio<1>,	std::ratio<-2>>																										force_unit;						///< Represents an SI derived unit of force
-		typedef base_unit<std::ratio<-1>,	std::ratio<1>,	std::ratio<-2>>																										pressure_unit;					///< Represents an SI derived unit of pressure
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<1>,	std::ratio<0>,	std::ratio<1>>																		charge_unit;					///< Represents an SI derived unit of charge
-		typedef base_unit<std::ratio<2>,	std::ratio<1>,	std::ratio<-2>>																										energy_unit;					///< Represents an SI derived unit of energy
-		typedef base_unit<std::ratio<2>,	std::ratio<1>,	std::ratio<-3>>																										power_unit;						///< Represents an SI derived unit of power
-		typedef base_unit<std::ratio<2>,	std::ratio<1>,	std::ratio<-3>,	std::ratio<0>,	std::ratio<-1>>																		voltage_unit;					///< Represents an SI derived unit of voltage
-		typedef base_unit<std::ratio<-2>,	std::ratio<-1>,	std::ratio<4>,	std::ratio<0>,	std::ratio<2>>																		capacitance_unit;				///< Represents an SI derived unit of capacitance
-		typedef base_unit<std::ratio<2>,	std::ratio<1>,	std::ratio<-3>,	std::ratio<0>,	std::ratio<-2>>																		impedance_unit;					///< Represents an SI derived unit of impedance
-		typedef base_unit<std::ratio<-2>,	std::ratio<-1>,	std::ratio<3>,	std::ratio<0>,	std::ratio<2>>																		conductance_unit;				///< Represents an SI derived unit of conductance
-		typedef base_unit<std::ratio<2>,	std::ratio<1>,	std::ratio<-2>,	std::ratio<0>,	std::ratio<-1>>																		magnetic_flux_unit;				///< Represents an SI derived unit of magnetic flux
-		typedef base_unit<std::ratio<0>,	std::ratio<1>,	std::ratio<-2>,	std::ratio<0>,	std::ratio<-1>>																		magnetic_field_strength_unit;	///< Represents an SI derived unit of magnetic field strength
-		typedef base_unit<std::ratio<2>,	std::ratio<1>,	std::ratio<-2>,	std::ratio<0>,	std::ratio<-2>>																		inductance_unit;				///< Represents an SI derived unit of inductance
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<2>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>						luminous_flux_unit;				///< Represents an SI derived unit of luminous flux
-		typedef base_unit<std::ratio<-2>,	std::ratio<0>,	std::ratio<0>,	std::ratio<2>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>						illuminance_unit;				///< Represents an SI derived unit of illuminance
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<-1>>																										radioactivity_unit;				///< Represents an SI derived unit of radioactivity
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<2>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>>						solid_angle_unit;				///< Represents an SI derived unit of solid angle
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<-1>>																										frequency_unit;					///< Represents an SI derived unit of frequency
+		typedef base_unit<detail::meter_ratio<1>,	std::ratio<0>,	std::ratio<-1>>																										velocity_unit;					///< Represents an SI derived unit of velocity
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<-1>,	std::ratio<1>>																						angular_velocity_unit;			///< Represents an SI derived unit of angular velocity
+		typedef base_unit<detail::meter_ratio<1>,	std::ratio<0>,	std::ratio<-2>>																										acceleration_unit;				///< Represents an SI derived unit of acceleration
+		typedef base_unit<detail::meter_ratio<1>,	std::ratio<1>,	std::ratio<-2>>																										force_unit;						///< Represents an SI derived unit of force
+		typedef base_unit<detail::meter_ratio<-1>,	std::ratio<1>,	std::ratio<-2>>																										pressure_unit;					///< Represents an SI derived unit of pressure
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<1>,	std::ratio<0>,	std::ratio<1>>																		charge_unit;					///< Represents an SI derived unit of charge
+		typedef base_unit<detail::meter_ratio<2>,	std::ratio<1>,	std::ratio<-2>>																										energy_unit;					///< Represents an SI derived unit of energy
+		typedef base_unit<detail::meter_ratio<2>,	std::ratio<1>,	std::ratio<-3>>																										power_unit;						///< Represents an SI derived unit of power
+		typedef base_unit<detail::meter_ratio<2>,	std::ratio<1>,	std::ratio<-3>,	std::ratio<0>,	std::ratio<-1>>																		voltage_unit;					///< Represents an SI derived unit of voltage
+		typedef base_unit<detail::meter_ratio<-2>,	std::ratio<-1>,	std::ratio<4>,	std::ratio<0>,	std::ratio<2>>																		capacitance_unit;				///< Represents an SI derived unit of capacitance
+		typedef base_unit<detail::meter_ratio<2>,	std::ratio<1>,	std::ratio<-3>,	std::ratio<0>,	std::ratio<-2>>																		impedance_unit;					///< Represents an SI derived unit of impedance
+		typedef base_unit<detail::meter_ratio<-2>,	std::ratio<-1>,	std::ratio<3>,	std::ratio<0>,	std::ratio<2>>																		conductance_unit;				///< Represents an SI derived unit of conductance
+		typedef base_unit<detail::meter_ratio<2>,	std::ratio<1>,	std::ratio<-2>,	std::ratio<0>,	std::ratio<-1>>																		magnetic_flux_unit;				///< Represents an SI derived unit of magnetic flux
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<1>,	std::ratio<-2>,	std::ratio<0>,	std::ratio<-1>>																		magnetic_field_strength_unit;	///< Represents an SI derived unit of magnetic field strength
+		typedef base_unit<detail::meter_ratio<2>,	std::ratio<1>,	std::ratio<-2>,	std::ratio<0>,	std::ratio<-2>>																		inductance_unit;				///< Represents an SI derived unit of inductance
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<2>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>						luminous_flux_unit;				///< Represents an SI derived unit of luminous flux
+		typedef base_unit<detail::meter_ratio<-2>,	std::ratio<0>,	std::ratio<0>,	std::ratio<2>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>						illuminance_unit;				///< Represents an SI derived unit of illuminance
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<-1>>																										radioactivity_unit;				///< Represents an SI derived unit of radioactivity
 
 		// OTHER UNIT TYPES
 		//					METERS			KILOGRAMS		SECONDS			RADIANS			AMPERES			KELVIN			MOLE			CANDELA			BYTE		---		CATEGORY			
-		typedef base_unit<std::ratio<2>,	std::ratio<1>,	std::ratio<-2>>																										torque_unit;					///< Represents an SI derived unit of torque
-		typedef base_unit<std::ratio<2>>																																		area_unit;						///< Represents an SI derived unit of area
-		typedef base_unit<std::ratio<3>>																																		volume_unit;					///< Represents an SI derived unit of volume
-		typedef base_unit<std::ratio<-3>,	std::ratio<1>>																														density_unit;					///< Represents an SI derived unit of density
+		typedef base_unit<detail::meter_ratio<2>,	std::ratio<1>,	std::ratio<-2>>																										torque_unit;					///< Represents an SI derived unit of torque
+		typedef base_unit<detail::meter_ratio<2>>																																		area_unit;						///< Represents an SI derived unit of area
+		typedef base_unit<detail::meter_ratio<3>>																																		volume_unit;					///< Represents an SI derived unit of volume
+		typedef base_unit<detail::meter_ratio<-3>,	std::ratio<1>>																														density_unit;					///< Represents an SI derived unit of density
 		typedef base_unit<>																																						concentration_unit;				///< Represents a unit of concentration
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>		data_unit;						///< Represents a unit of data size
-		typedef base_unit<std::ratio<0>,	std::ratio<0>,	std::ratio<-1>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>		data_transfer_rate_unit;		///< Represents a unit of data transfer rate
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>		data_unit;						///< Represents a unit of data size
+		typedef base_unit<detail::meter_ratio<0>,	std::ratio<0>,	std::ratio<-1>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<0>,	std::ratio<1>>		data_transfer_rate_unit;		///< Represents a unit of data transfer rate
 	}
 
 	//------------------------------
@@ -4548,6 +4554,7 @@ namespace units
 		}
 
 	}	// end namespace math
+	UNIT_ADD(length, square_meters_per_second, square_meters_per_second, m2ps, unit < std::ratio<1>, compound_unit<area::square_meters, inverse<time::second>>>);
 
 }	// end namespace units