diff --git a/examples/c++/hmtrp.cxx b/examples/c++/hmtrp.cxx
index 3d58ba96..3de0671d 100644
--- a/examples/c++/hmtrp.cxx
+++ b/examples/c++/hmtrp.cxx
@@ -135,7 +135,7 @@ int main (int argc, char **argv)
               if (rv > 0)
                 cout << "Received: " << radioBuffer << endl;
               
-              if (rv < 0) // some sort of read error occured
+              if (rv < 0) // some sort of read error occurred
                 {
                   cerr << "Port read error." << endl;
                   break;
diff --git a/examples/c++/ublox6.cxx b/examples/c++/ublox6.cxx
index a0cd5f29..adc2886d 100644
--- a/examples/c++/ublox6.cxx
+++ b/examples/c++/ublox6.cxx
@@ -77,7 +77,7 @@ int main (int argc, char **argv)
           if (rv > 0)
             write(1, nmeaBuffer, rv);
 
-          if (rv < 0) // some sort of read error occured
+          if (rv < 0) // some sort of read error occurred
             {
               cerr << "Port read error." << endl;
               break;
diff --git a/examples/java/AM2315Example.java b/examples/java/AM2315Example.java
index 1edf785c..3da2ff57 100644
--- a/examples/java/AM2315Example.java
+++ b/examples/java/AM2315Example.java
@@ -57,7 +57,7 @@ public class AM2315Example {
 				Thread.sleep(1000);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following exception occured: "+e.getMessage());
+				System.out.println("The following exception occurred: "+e.getMessage());
 			}
 		}
 		//! [Interesting]
diff --git a/examples/java/Ad8232Example.java b/examples/java/Ad8232Example.java
index d707fcb5..0ee0f2c0 100644
--- a/examples/java/Ad8232Example.java
+++ b/examples/java/Ad8232Example.java
@@ -42,7 +42,7 @@ public class Ad8232Example {
 				Thread.sleep(1);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following error has occured: "+e.getMessage());
+				System.out.println("The following error has occurred: "+e.getMessage());
 			}
 		}
 	}
diff --git a/examples/java/Apds9002.java b/examples/java/Apds9002.java
index 4bb5de8f..0c6b7cb7 100644
--- a/examples/java/Apds9002.java
+++ b/examples/java/Apds9002.java
@@ -38,7 +38,7 @@ public class Apds9002 {
 				Thread.sleep(1000);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following exception occured: "+e.getMessage());
+				System.out.println("The following exception occurred: "+e.getMessage());
 			}
 		}
 		//! [Interesting]
diff --git a/examples/java/Gp2y0aExample.java b/examples/java/Gp2y0aExample.java
index 0837f559..1501b877 100644
--- a/examples/java/Gp2y0aExample.java
+++ b/examples/java/Gp2y0aExample.java
@@ -59,7 +59,7 @@ public class Gp2y0aExample {
 				Thread.sleep(1000);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following exception occured: "+e.getMessage());
+				System.out.println("The following exception occurred: "+e.getMessage());
 			}
 		}
 		//! [Interesting]
diff --git a/examples/java/GroveEmg.java b/examples/java/GroveEmg.java
index eaa8ba04..98277011 100644
--- a/examples/java/GroveEmg.java
+++ b/examples/java/GroveEmg.java
@@ -39,7 +39,7 @@ public class GroveEmg {
 				Thread.sleep(100);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following exception occured: "+e.getMessage());
+				System.out.println("The following exception occurred: "+e.getMessage());
 			}
 		}
 	}
diff --git a/examples/java/GroveGsr.java b/examples/java/GroveGsr.java
index 08a04b9d..d7e9a69c 100644
--- a/examples/java/GroveGsr.java
+++ b/examples/java/GroveGsr.java
@@ -41,7 +41,7 @@ public class GroveGsr {
 				Thread.sleep(500);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following exception occured: "+e.getMessage());
+				System.out.println("The following exception occurred: "+e.getMessage());
 			}
 		}
 		//! [Interesting]
diff --git a/examples/java/GroveO2Example.java b/examples/java/GroveO2Example.java
index fe22b80f..6ef0e61e 100644
--- a/examples/java/GroveO2Example.java
+++ b/examples/java/GroveO2Example.java
@@ -38,7 +38,7 @@ public class GroveO2Example {
 				Thread.sleep(100);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following exception has occured: "+e.getMessage());
+				System.out.println("The following exception has occurred: "+e.getMessage());
 			}
 		}
 		//! [Interesting]
diff --git a/examples/java/HP20xExample.java b/examples/java/HP20xExample.java
index 80820314..17e94411 100644
--- a/examples/java/HP20xExample.java
+++ b/examples/java/HP20xExample.java
@@ -42,7 +42,7 @@ public class HP20xExample {
 				Thread.sleep(1000);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following exception occured: "+e.getMessage());
+				System.out.println("The following exception occurred: "+e.getMessage());
 			}
 		}
 		//! [Interesting]
diff --git a/examples/java/Th02Example.java b/examples/java/Th02Example.java
index 3cb06ae7..206f89ec 100644
--- a/examples/java/Th02Example.java
+++ b/examples/java/Th02Example.java
@@ -39,7 +39,7 @@ public class Th02Example {
 				Thread.sleep(500);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following exception has occured: "+e.getMessage());
+				System.out.println("The following exception has occurred: "+e.getMessage());
 			}
 		}
 	}
diff --git a/examples/java/Tsl2561.java b/examples/java/Tsl2561.java
index e38a4e5e..895b2e5d 100644
--- a/examples/java/Tsl2561.java
+++ b/examples/java/Tsl2561.java
@@ -52,7 +52,7 @@ public class Tsl2561 {
 				Thread.sleep(1000);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following exception occured: "+e.getMessage());
+				System.out.println("The following exception occurred: "+e.getMessage());
 			}
 		}
 		//! [Interesting]
diff --git a/examples/java/WaterLevelSensor.java b/examples/java/WaterLevelSensor.java
index d08aaee3..c13ec5b7 100644
--- a/examples/java/WaterLevelSensor.java
+++ b/examples/java/WaterLevelSensor.java
@@ -43,7 +43,7 @@ public class WaterLevelSensor {
 				Thread.sleep(1000);
 			} catch (InterruptedException e) {
 				// TODO Auto-generated catch block
-				System.out.println("The following exception occured: "+e.getMessage());
+				System.out.println("The following exception occurred: "+e.getMessage());
 			}
 		}
 		//! [Interesting]
diff --git a/examples/javascript/hmtrp.js b/examples/javascript/hmtrp.js
index 3bdd0f20..94a803dc 100644
--- a/examples/javascript/hmtrp.js
+++ b/examples/javascript/hmtrp.js
@@ -128,7 +128,7 @@ function runRadio()
 			console.log("Received: " + resultStr);
 		}
 
-		if (rv < 0) // some sort of read error occured
+		if (rv < 0) // some sort of read error occurred
 		{
 			console.log("Port read error.");
 			return;
diff --git a/examples/javascript/ublox6.js b/examples/javascript/ublox6.js
index d68640a1..50bad1a2 100644
--- a/examples/javascript/ublox6.js
+++ b/examples/javascript/ublox6.js
@@ -66,7 +66,7 @@ function getGPSInfo()
 			process.stdout.write(GPSData)
 		}
 
-		if (rv < 0) // some sort of read error occured
+		if (rv < 0) // some sort of read error occurred
 		{
 			console.log("Port read error.");
 			process.exit(0);
diff --git a/examples/python/hmtrp.py b/examples/python/hmtrp.py
index dd2298f0..9b8fe195 100644
--- a/examples/python/hmtrp.py
+++ b/examples/python/hmtrp.py
@@ -123,7 +123,7 @@ else:
 					resultStr += radioBuffer.__getitem__(x)
 				print "Received:", resultStr
 
-			if (rv < 0): # some sort of read error occured
+			if (rv < 0): # some sort of read error occurred
 				print "Port read error."
 				sys.exit(0)
 		myCounter += 1
diff --git a/examples/python/ublox6.py b/examples/python/ublox6.py
index bb98d2bf..c2e03226 100644
--- a/examples/python/ublox6.py
+++ b/examples/python/ublox6.py
@@ -73,7 +73,7 @@ def getGPSInfo():
 				GPSData += nmeaBuffer.__getitem__(x)
 			sys.stdout.write(GPSData)
 
-		if (rv < 0): # some sort of read error occured
+		if (rv < 0): # some sort of read error occurred
 			print "Port read error."
 			sys.exit(0)
 
diff --git a/src/adxrs610/adxrs610.h b/src/adxrs610/adxrs610.h
index 07bc3897..ac8cdb03 100644
--- a/src/adxrs610/adxrs610.h
+++ b/src/adxrs610/adxrs610.h
@@ -113,7 +113,7 @@ namespace upm {
     /**
      * Set the zero point.  This is the point measured and averaged
      * when the sensor is not moving.  It is set at construction time
-     * (averaged over a number of samples), but can be overriden here.
+     * (averaged over a number of samples), but can be overridden here.
      *
      * @param zeroPoint The averaged zero point of the sensor at rest
      */
diff --git a/src/apa102/apa102.h b/src/apa102/apa102.h
index d281a88a..34033e8b 100644
--- a/src/apa102/apa102.h
+++ b/src/apa102/apa102.h
@@ -62,7 +62,7 @@ class APA102
      *
      * @param ledCount  Number of APA102 leds in the strip
      * @param spiBus    SPI Bus number
-     * @param batchMode (optional) Immediatly write to SPI (false, default) or wait for a pushState
+     * @param batchMode (optional) Immediately write to SPI (false, default) or wait for a pushState
      * call (true)
      * @param csn       (optional) Chip Select Pin
      */
diff --git a/src/h3lis331dl/h3lis331dl.h b/src/h3lis331dl/h3lis331dl.h
index 90b8a022..775ec02f 100644
--- a/src/h3lis331dl/h3lis331dl.h
+++ b/src/h3lis331dl/h3lis331dl.h
@@ -522,7 +522,7 @@ namespace upm {
     /**
      * Sets up the interrupt 1 threshold register
      *
-     * @param val Threshhold to set
+     * @param val Threshold to set
      * @return True if successful
      */
     bool setInterrupt1Threshold(uint8_t val);
@@ -530,7 +530,7 @@ namespace upm {
     /**
      * Sets up the interrupt 2 threshold register
      *
-     * @param val Threshhold to set
+     * @param val Threshold to set
      * @return True if successful
      */
     bool setInterrupt2Threshold(uint8_t val);
diff --git a/src/mpu9150/mpu60x0.h b/src/mpu9150/mpu60x0.h
index 1737a697..23f292f5 100644
--- a/src/mpu9150/mpu60x0.h
+++ b/src/mpu9150/mpu60x0.h
@@ -851,7 +851,7 @@ namespace upm {
 
     /**
      * enable I2C Bypass.  Enabling this feature allows devices on the
-     * MPU60X0 auxillary I2C bus to be visible on the MCU's I2C bus.
+     * MPU60X0 auxiliary I2C bus to be visible on the MCU's I2C bus.
      *
      * @param enable true to I2C bypass
      * @return true if successful, false otherwise
diff --git a/src/nlgpio16/nlgpio16.h b/src/nlgpio16/nlgpio16.h
index 4070690e..fa65276f 100644
--- a/src/nlgpio16/nlgpio16.h
+++ b/src/nlgpio16/nlgpio16.h
@@ -177,8 +177,8 @@ namespace upm {
 
     /**
      * Set the driection mode (input or output) for all gpios enabled
-     * by gpioSetIOMask().  A 0 in a given bit postion (LSB = gpio0)
-     * configures the gpio as an ouput, and a 1 bit configures the
+     * by gpioSetIOMask().  A 0 in a given bit position (LSB = gpio0)
+     * configures the gpio as an output, and a 1 bit configures the
      * gpio as an input.  Only the gpios enabled by gpioSetMask() are
      * affected by this call.
      *
@@ -211,7 +211,7 @@ namespace upm {
 
     /**
      * Read the raw analog input value present at the given gpio and
-     * return the coresponding voltage value at the pin.  The gpio is
+     * return the corresponding voltage value at the pin.  The gpio is
      * switched to analog input mode by this call, regardless of any
      * previous mode.  The returned value will be a number between
      * 0.0-3.3, depending on the voltage present at the pin.  Only the
diff --git a/src/nrf8001/hal_aci_tl.cpp b/src/nrf8001/hal_aci_tl.cpp
index 9d36a8e2..2610baea 100644
--- a/src/nrf8001/hal_aci_tl.cpp
+++ b/src/nrf8001/hal_aci_tl.cpp
@@ -371,17 +371,17 @@ void hal_aci_tl_init(aci_pins_t *a_pins, bool debug)
 
     error = mraa_gpio_dir (a_pins->m_rdy_ctx, MRAA_GPIO_IN);
     if (error != MRAA_SUCCESS) {
-        printf ("[ERROR] GPIO failed to initilize \n");
+        printf ("[ERROR] GPIO failed to initialize \n");
     }
 
     error = mraa_gpio_dir (a_pins->m_req_ctx, MRAA_GPIO_OUT);
     if (error != MRAA_SUCCESS) {
-        printf ("[ERROR] GPIO failed to initilize \n");
+        printf ("[ERROR] GPIO failed to initialize \n");
     }
 
     error = mraa_gpio_dir (a_pins->m_rst_ctx, MRAA_GPIO_OUT);
     if (error != MRAA_SUCCESS) {
-        printf ("[ERROR] GPIO failed to initilize \n");
+        printf ("[ERROR] GPIO failed to initialize \n");
     }
 
     if (UNUSED != a_pins->active_pin) {
diff --git a/src/ozw/ozw.h b/src/ozw/ozw.h
index e4f4152e..d76fdcd0 100644
--- a/src/ozw/ozw.h
+++ b/src/ozw/ozw.h
@@ -398,7 +398,7 @@ namespace upm {
      * library.  Most modern devices are never polled, rather they are
      * configured to report changing values to the controller on their
      * own at device specific intervals or when appropriate events
-     * (depending the device) have occured.
+     * (depending the device) have occurred.
      *
      * @param nodeId The node ID
      * @param index The value index (see dumpNodes()) of the value to query.
diff --git a/src/pn532/pn532.cxx b/src/pn532/pn532.cxx
index 2ac512d2..efb5b794 100644
--- a/src/pn532/pn532.cxx
+++ b/src/pn532/pn532.cxx
@@ -192,8 +192,8 @@ uint32_t PN532::getFirmwareVersion()
   @param  cmdlen    The size of the command in bytes 
   @param  timeout   timeout before giving up
     
-  @returns  1 if everything is OK, 0 if timeout occured before an
-  ACK was recieved
+  @returns  1 if everything is OK, 0 if timeout occurred before an
+  ACK was received
 */
 /**************************************************************************/
 // default timeout of one second
diff --git a/src/pn532/pn532.h b/src/pn532/pn532.h
index 206eb5b0..0ac7b3ab 100644
--- a/src/pn532/pn532.h
+++ b/src/pn532/pn532.h
@@ -232,8 +232,8 @@ namespace upm {
      * @param  cmdlen    the size of the command in bytes 
      * @param  timeout   timeout before giving up (in ms)
      * 
-     * @return true if everything is OK, false if timeout occured
-     * before an ACK was recieved
+     * @return true if everything is OK, false if timeout occurred
+     * before an ACK was received
      */
     bool sendCommandCheckAck(uint8_t *cmd, uint8_t cmdlen, 
                              uint16_t timeout=1000);
diff --git a/src/si1132/si1132.cxx b/src/si1132/si1132.cxx
index c1f03e29..2228cf33 100644
--- a/src/si1132/si1132.cxx
+++ b/src/si1132/si1132.cxx
@@ -189,7 +189,7 @@ mraa::Result SI1132::runCommand(uint8_t command)
     }
     if (response == 0) {
         status = mraa::ERROR_UNSPECIFIED;
-        fprintf(stderr, "Comand %d failed\n", command);
+        fprintf(stderr, "Command %d failed\n", command);
     }
     return status;
 }
diff --git a/src/smartdrive/smartdrive.cxx b/src/smartdrive/smartdrive.cxx
index 1df1fec3..23a7570b 100644
--- a/src/smartdrive/smartdrive.cxx
+++ b/src/smartdrive/smartdrive.cxx
@@ -397,7 +397,7 @@ SmartDrive::GetMotorStatus(int motor_id) {
     if (motor_id == SmartDrive_Motor_ID_2)
         status = readByte(SmartDrive_STATUS_M1);
     if (motor_id == SmartDrive_Motor_ID_BOTH) {
-        std::cout << "Please specifiy which motor's status you want to fetch !" << std::endl;
+        std::cout << "Please specify which motor's status you want to fetch !" << std::endl;
     }
     return status;
 }
@@ -425,6 +425,6 @@ SmartDrive::PrintMotorStatus(int motor_id) {
     std::cout << "Motor " << motor_id+1 << " is " <<  ((is_stalled == 0) ? "NOT" : "") << " stalled" << std::endl;
 
     } else {
-        std::cout << "Please specifiy which motor's status you want to fetch !" << std::endl;
+        std::cout << "Please specify which motor's status you want to fetch !" << std::endl;
     }
 }
diff --git a/src/sx1276/sx1276.h b/src/sx1276/sx1276.h
index e23a3953..6ef88cf4 100644
--- a/src/sx1276/sx1276.h
+++ b/src/sx1276/sx1276.h
@@ -1740,7 +1740,7 @@ namespace upm {
      *                          FSK : N/A ( set to 0 ) 
      *                          LoRa: timeout in symbols
      * @param fixLen Fixed length packets [false: variable, true: fixed]
-     * @param payloadLen Sets payload length when fixed lenght is used
+     * @param payloadLen Sets payload length when fixed length is used
      * @param crcOn Enables/Disables the CRC [false: OFF, true: ON]
      * @param FreqHopOn Enables disables the intra-packet frequency hopping
      *                          FSK : N/A ( set to 0 )