diff --git a/Documentation/Doxyfile b/Documentation/Doxyfile
index b674fbc485..fad7cab292 100644
--- a/Documentation/Doxyfile
+++ b/Documentation/Doxyfile
@@ -281,7 +281,7 @@ TYPEDEF_HIDES_STRUCT   = NO
 # causing a significant performance penality.
 # If the system has enough physical memory increasing the cache will improve the
 # performance by keeping more symbols in memory. Note that the value works on
-# a logarithmic scale so increasing the size by one will rougly double the
+# a logarithmic scale so increasing the size by one will roughly double the
 # memory usage. The cache size is given by this formula:
 # 2^(16+SYMBOL_CACHE_SIZE). The valid range is 0..9, the default is 0,
 # corresponding to a cache size of 2^16 = 65536 symbols
diff --git a/src/lib/launchdetection/LaunchMethod.h b/src/lib/launchdetection/LaunchMethod.h
index 8b5220cb3c..66ee3f2c6e 100644
--- a/src/lib/launchdetection/LaunchMethod.h
+++ b/src/lib/launchdetection/LaunchMethod.h
@@ -51,7 +51,7 @@ enum LaunchDetectionResult {
 							  up and still be set to 'throttlePreTakeoff'.
 							  For instance this is used to have a delay for the motor
 							  when launching a fixed wing aircraft from a bungee */
-	LAUNCHDETECTION_RES_DETECTED_ENABLEMOTORS = 2 /**< Launch has been detected, teh controller should control
+	LAUNCHDETECTION_RES_DETECTED_ENABLEMOTORS = 2 /**< Launch has been detected, the controller should control
 							attitude and also throttle up the motors. */
 };
 
diff --git a/src/lib/launchdetection/launchdetection_params.c b/src/lib/launchdetection/launchdetection_params.c
index e5070eeaaf..22650bc678 100644
--- a/src/lib/launchdetection/launchdetection_params.c
+++ b/src/lib/launchdetection/launchdetection_params.c
@@ -54,7 +54,7 @@
 PARAM_DEFINE_INT32(LAUN_ALL_ON, 0);
 
 /**
- * Catapult accelerometer theshold.
+ * Catapult accelerometer threshold.
  *
  * LAUN_CAT_A * LAUN_CAT_T serves as threshold to trigger launch detection.
  *
@@ -64,7 +64,7 @@ PARAM_DEFINE_INT32(LAUN_ALL_ON, 0);
 PARAM_DEFINE_FLOAT(LAUN_CAT_A, 30.0f);
 
 /**
- * Catapult time theshold.
+ * Catapult time threshold.
  *
  * LAUN_CAT_A * LAUN_CAT_T serves as threshold to trigger launch detection.
  *
diff --git a/src/lib/rc/sbus.c b/src/lib/rc/sbus.c
index fe72bfb959..bfec926bce 100644
--- a/src/lib/rc/sbus.c
+++ b/src/lib/rc/sbus.c
@@ -615,7 +615,7 @@ sbus_decode(uint64_t frame_time, uint8_t *frame, uint16_t *values, uint16_t *num
 		 *
 		 * Attention! This flag indicates a skipped frame only, not a total link loss! Handling this
 		 * condition as fail-safe greatly reduces the reliability and range of the radio link,
-		 * e.g. by prematurely issueing return-to-launch!!! */
+		 * e.g. by prematurely issuing return-to-launch!!! */
 
 		*sbus_failsafe = false;
 		*sbus_frame_drop = true;
diff --git a/src/modules/attitude_estimator_ekf/AttitudeEKF.m b/src/modules/attitude_estimator_ekf/AttitudeEKF.m
index fea1a773e3..cf559919ae 100644
--- a/src/modules/attitude_estimator_ekf/AttitudeEKF.m
+++ b/src/modules/attitude_estimator_ekf/AttitudeEKF.m
@@ -2,7 +2,7 @@ function [xa_apo,Pa_apo,Rot_matrix,eulerAngles,debugOutput]...
     = AttitudeEKF(approx_prediction,use_inertia_matrix,zFlag,dt,z,q_rotSpeed,q_rotAcc,q_acc,q_mag,r_gyro,r_accel,r_mag,J)
 
 
-%LQG Postion Estimator and Controller
+%LQG Position Estimator and Controller
 % Observer:
 %        x[n|n]   = x[n|n-1] + M(y[n] - Cx[n|n-1] - Du[n])
 %        x[n+1|n] = Ax[n|n] + Bu[n]
diff --git a/src/modules/attitude_estimator_ekf/codegen/AttitudeEKF.c b/src/modules/attitude_estimator_ekf/codegen/AttitudeEKF.c
index 68db382cfe..25bdde5cf1 100644
--- a/src/modules/attitude_estimator_ekf/codegen/AttitudeEKF.c
+++ b/src/modules/attitude_estimator_ekf/codegen/AttitudeEKF.c
@@ -499,7 +499,7 @@ void AttitudeEKF(unsigned char approx_prediction, unsigned char
 
   float b_z[6];
 
-  /* LQG Postion Estimator and Controller */
+  /* LQG Position Estimator and Controller */
   /*  Observer: */
   /*         x[n|n]   = x[n|n-1] + M(y[n] - Cx[n|n-1] - Du[n]) */
   /*         x[n+1|n] = Ax[n|n] + Bu[n] */
diff --git a/src/modules/commander/commander_tests/state_machine_helper_test.cpp b/src/modules/commander/commander_tests/state_machine_helper_test.cpp
index 967304cb45..2611136347 100644
--- a/src/modules/commander/commander_tests/state_machine_helper_test.cpp
+++ b/src/modules/commander/commander_tests/state_machine_helper_test.cpp
@@ -75,11 +75,11 @@ bool StateMachineHelperTest::armingStateTransitionTest(void)
     } ArmingTransitionVolatileState_t;
 
     // This structure represents a test case for arming_state_transition. It contains the machine
-    // state prior to transtion, the requested state to transition to and finally the expected
+    // state prior to transition, the requested state to transition to and finally the expected
     // machine state after transition.
     typedef struct {
         const char*                     assertMsg;                              // Text to show when test case fails
-        ArmingTransitionVolatileState_t current_state;                          // Machine state prior to transtion
+        ArmingTransitionVolatileState_t current_state;                          // Machine state prior to transition
         hil_state_t                     hil_state;                              // Current vehicle_status_s.hil_state
         bool                            condition_system_sensors_initialized;   // Current vehicle_status_s.condition_system_sensors_initialized
         bool                            safety_switch_available;                // Current safety_s.safety_switch_available
diff --git a/src/modules/local_position_estimator/BlockLocalPositionEstimator.hpp b/src/modules/local_position_estimator/BlockLocalPositionEstimator.hpp
index 1c6c43fd20..18b373f6b4 100644
--- a/src/modules/local_position_estimator/BlockLocalPositionEstimator.hpp
+++ b/src/modules/local_position_estimator/BlockLocalPositionEstimator.hpp
@@ -145,7 +145,7 @@ private:
 	// predict the next state
 	void predict();
 
-	// correct the state prediction wtih a measurement
+	// correct the state prediction with a measurement
 	void correctBaro();
 	void correctGps();
 	void correctLidar();
diff --git a/src/modules/muorb/adsp/uORBFastRpcChannel.cpp b/src/modules/muorb/adsp/uORBFastRpcChannel.cpp
index cd8648f08a..08266a3f07 100644
--- a/src/modules/muorb/adsp/uORBFastRpcChannel.cpp
+++ b/src/modules/muorb/adsp/uORBFastRpcChannel.cpp
@@ -35,7 +35,7 @@
 #include <algorithm>
 #include <drivers/drv_hrt.h>
 
-// static intialization.
+// static initialization.
 uORB::FastRpcChannel uORB::FastRpcChannel::_Instance;
 
 static unsigned long _dropped_pkts;
diff --git a/src/modules/muorb/krait/uORBKraitFastRpcChannel.cpp b/src/modules/muorb/krait/uORBKraitFastRpcChannel.cpp
index 71d052b4c6..4fbb3727f5 100644
--- a/src/modules/muorb/krait/uORBKraitFastRpcChannel.cpp
+++ b/src/modules/muorb/krait/uORBKraitFastRpcChannel.cpp
@@ -44,7 +44,7 @@ uORB::KraitFastRpcChannel uORB::KraitFastRpcChannel::_Instance;
 
 static void DumpData(uint8_t *buffer, int32_t length, int32_t num_topics);
 
-// static intialization.
+// static initialization.
 static std::string _log_file_name = "./hex_dump.txt";
 
 static unsigned long _snd_msg_min = 0xFFFFFF;
diff --git a/src/modules/systemlib/mixer/mixer.h b/src/modules/systemlib/mixer/mixer.h
index 5ed152127a..5063633cc0 100644
--- a/src/modules/systemlib/mixer/mixer.h
+++ b/src/modules/systemlib/mixer/mixer.h
@@ -481,7 +481,7 @@ public:
 	 *				compared to thrust.
 	 * @param yaw_wcale		Scaling factor applied to yaw inputs compared
 	 *				to thrust.
-	 * @param idle_speed		Minumum rotor control output value; usually
+	 * @param idle_speed		Minimum rotor control output value; usually
 	 *				tuned to ensure that rotors never stall at the
 	 * 				low end of their control range.
 	 */
diff --git a/src/modules/systemlib/up_cxxinitialize.c b/src/modules/systemlib/up_cxxinitialize.c
index 6460b03c9d..b496a87bd1 100644
--- a/src/modules/systemlib/up_cxxinitialize.c
+++ b/src/modules/systemlib/up_cxxinitialize.c
@@ -118,7 +118,7 @@ extern uint32_t _etext;
  *   This function should then be called in the application-specific
  *   user_start logic in order to perform the C++ initialization.  NOTE
  *   that no component of the core NuttX RTOS logic is involved; This
- *   function defintion only provides the 'contract' between application
+ *   function definition only provides the 'contract' between application
  *   specific C++ code and platform-specific toolchain support
  *
  ***************************************************************************/
diff --git a/src/modules/systemlib/uthash/doc/userguide.txt b/src/modules/systemlib/uthash/doc/userguide.txt
index 3e65a52fc9..2d746593f2 100644
--- a/src/modules/systemlib/uthash/doc/userguide.txt
+++ b/src/modules/systemlib/uthash/doc/userguide.txt
@@ -1058,7 +1058,7 @@ always used with the `users_by_name` hash table).
 
 Several sort orders
 ~~~~~~~~~~~~~~~~~~~
-It comes as no suprise that two hash tables can have different sort orders, but
+It comes as no surprise that two hash tables can have different sort orders, but
 this fact can also be used advantageously to sort the 'same items' in several
 ways. This is based on the ability to store a structure in several hash tables.