diff --git a/README.md b/README.md
index 6b8e2e1..19f0268 100644
--- a/README.md
+++ b/README.md
@@ -10,16 +10,16 @@ make -j`nproc`
 ```
 
 ## Classes
-- **CPU** - Get CPU informations.
+- **CPU** - Get CPU information.
 - **DoubleExtras** - Less, Greater, Equal, Between, Round, Split.
 - **Exec** - Run command and return stdout or mixed (stdout and stderr) and result code.
 - **KeyState** - Check for caps lock state.
 - **Serial** - Serial communication class.
 - **StringExtras** - LeftTrim, RightTrim, Trim.
-- **Timing** - Measering time, cpu and real time.
+- **Timing** - Measuring time, cpu and real time.
 
 ## Template classes
-- **CSVWriter** - Write out comma seperated values.
+- **CSVWriter** - Write out comma-separated values.
 - **Timer** - Timeout thread on time or interval.
 
 ## Unixservice class
diff --git a/source/CPU.h b/source/CPU.h
index 16fac09..9c17655 100644
--- a/source/CPU.h
+++ b/source/CPU.h
@@ -39,7 +39,7 @@
 namespace vx {
 
   /**
-   * @brief The CPU class for receiving information about the CPU.
+   * @brief The CPU class to receive information about the CPU.
    * @author Florian Becker <fb\@vxapps.com> (VX Apps)
    */
   class CPU {
@@ -90,43 +90,43 @@ namespace vx {
     inline unsigned int extendedFamily() const { return ( m_leaf[0] >> 20 ) & 0xFF; }
 
     /**
-     * @brief Does cpu supports smx?
+     * @brief Does cpu support smx?
      * @return True, if the cpu supports smx - otherwise false.
      */
     inline bool smxSupport() const { return ( m_leaf[2] >> 6 ) & 1; }
 
     /**
-     * @brief Does cpu supports sgx?
+     * @brief Does cpu support sgx?
      * @return True, if the cpu supports sgx - otherwise false.
      */
     inline bool sgxSupport() const { return ( m_extendedLeaf[1] >> 2 ) & 0x1; }
 
     /**
-     * @brief Does cpu supports sgx launch control?
+     * @brief Does cpu support sgx launch control?
      * @return True, if the cpu supports sgx launch control - otherwise false.
      */
     inline bool sgxLaunchControlSupport() const { return ( m_extendedLeaf[2] >> 30 ) & 0x01; }
 
     /**
-     * @brief Does cpu supports sgx version 1?
+     * @brief Does cpu support sgx version 1?
      * @return True, if the cpu supports sgx version 1 - otherwise false.
      */
     inline bool sgxVersion1Support() const { return m_sgxLeaf[0] & 0x1; }
 
     /**
-     * @brief Does cpu supports sgx version 2?
+     * @brief Does cpu support sgx version 2?
      * @return True, if the cpu supports sgx version 2 - otherwise false.
      */
     inline bool sgxVersion2Support() const { return ( m_sgxLeaf[0] >> 1 ) & 0x1; }
 
     /**
-     * @brief Maximum size of enclave.
+     * @brief Returns maximum size of enclave.
      * @return Maximum enclave size.
      */
     inline unsigned int maximumEnclaveSize() const { return m_sgxLeaf[2] & 0xFF; }
 
     /**
-     * @brief Maximum size of enclave.
+     * @brief Returns maximum size of enclave.
      * @return Maximum enclave size.
      */
     inline unsigned int maximumEnclaveSize64() const { return ( m_sgxLeaf[2] >> 8 ) & 0xFF; }
@@ -165,7 +165,7 @@ namespace vx {
 
   private:
     /**
-     * @brief Current asked leaf.
+     * @brief Currently asked leaf.
      */
     std::array<unsigned int, 4> m_currentLeaf = {};
 
diff --git a/source/DoubleExtras.h b/source/DoubleExtras.h
index 71cf42c..3a0f525 100644
--- a/source/DoubleExtras.h
+++ b/source/DoubleExtras.h
@@ -48,11 +48,11 @@ namespace vx {
                     double _right );
 
   /**
-   * @brief Is _left less _right or _orEqual?
+   * @brief Is _left less than _right or _orEqual?
    * @param _left   The first value.
    * @param _right   The second value.
    * @param _orEqual   Check if _left and _right are equal - default false.
-   * @return True, if _left less _right or _left and _right are equal and
+   * @return True, if _left is less than _right or _left and _right are equal and
    * _orEqual is set to true - otherwise false.
    */
   bool doubleLess( double _left,
@@ -60,11 +60,11 @@ namespace vx {
                    bool _orEqual = false );
 
   /**
-   * @brief Is _left greater _right or _orEqual?
+   * @brief Is _left greater than _right or _orEqual?
    * @param _left   The first value.
    * @param _right   The second value.
    * @param _orEqual   Check if _left and _right are equal - default false.
-   * @return True, if _left greater _right or _left and _right are equal and
+   * @return True, if _left is greater than _right or _left and _right are equal and
    * _orEqual is set to true - otherwise false.
    */
   bool doubleGreater( double _left,
@@ -85,18 +85,18 @@ namespace vx {
                       bool _orEqual = false );
 
   /**
-   * @brief Round a double _value by _precision. Rounded by default to second places.
+   * @brief Round a double _value by _precision. Rounded by default to two decimal places.
    * @param _value   Value to round.
-   * @param _precision   Places to round.
+   * @param _precision   Decimal places to round.
    * @return The rounded value.
    */
   double doubleRound( double _value,
                       std::size_t _precision = 2 );
 
   /**
-   * @brief Split a double _value to its integral and fraction parts.
+   * @brief Split a double _value to its integer and decimal places.
    * @param _value   Value to split.
-   * @return The integral and fraction part.
+   * @return The integer and decimal places.
    */
   std::pair<double, double> doubleSplit( double _value );
 }
diff --git a/source/Serial.h b/source/Serial.h
index 9b0c29d..8f671ea 100644
--- a/source/Serial.h
+++ b/source/Serial.h
@@ -43,10 +43,10 @@ namespace vx {
    */
   enum class Baudrate {
 
-    Speed9600 = 9000, /**< Baudrate speed of 9600. */
-    Speed19200 = 19200, /**< Baudrate speed of 19200. */
-    Speed38400 = 38400, /**< Baudrate speed of 38400. */
-    Speed57600 = 57600 /**< Baudrate speed of 57600. */
+    Speed9600 = 9000, /**< Baudrate of 9600. */
+    Speed19200 = 19200, /**< Baudrate of 19200. */
+    Speed38400 = 38400, /**< Baudrate of 38400. */
+    Speed57600 = 57600 /**< Baudrate of 57600. */
   };
 
   /**
@@ -59,7 +59,7 @@ namespace vx {
     /**
      * @brief Default constructor for Serial.
      * @param _path   Device path.
-     * @param _baudrate   Baudrate speed.
+     * @param _baudrate   Baudrate.
      */
     explicit Serial( const std::string &_path,
                      Baudrate _baudrate = Baudrate::Speed9600 );
@@ -92,21 +92,21 @@ namespace vx {
     virtual ~Serial();
 
     /**
-     * @brief Is the serial device open.
+     * @brief Is the serial device open?
      * @return True, if open - otherwise false.
      */
     inline bool isOpen() const { return m_isOpen; }
 
     /**
      * @brief Flush the serial port.
-     * @return True, if fushing is successded - otherwise false.
+     * @return True, if fushing is successful - otherwise false.
      */
     bool flush() const;
 
     /**
      * @brief Write data to the serial device.
      * @param _data   Date written to the device.
-     * @return True, if the data written was successfull - otherwise false.
+     * @return True, if the data writing was successful - otherwise false.
      */
     bool write( const std::string &_data ) const;
 
@@ -118,7 +118,7 @@ namespace vx {
 
     /**
      * @brief Descriptor of current device.
-     * @return The descriptor of the serial device - -1 is not valid descriptor.
+     * @return The descriptor of the serial device - -1 is not a valid descriptor.
      */
     inline int descriptor() const { return m_descriptor; }
 
@@ -134,7 +134,7 @@ namespace vx {
     bool m_isOpen = false;
 
     /**
-     * @brief Membber for descriptor.
+     * @brief Member for descriptor.
      */
     int m_descriptor = -1;
   };
diff --git a/source/Timing.h b/source/Timing.h
index 18cf389..85867ec 100644
--- a/source/Timing.h
+++ b/source/Timing.h
@@ -50,7 +50,7 @@ namespace vx {
 
   public:
     /**
-     * @brief Default constuctor for Timing.
+     * @brief Default constructor for Timing.
      */
     Timing() = default;
 
@@ -83,12 +83,12 @@ namespace vx {
     std::string m_action = {};
 
     /**
-     * @brief Clock to calculate system time elapsed.
+     * @brief Clock to calculate the elapsed system time.
      */
     std::chrono::time_point<std::chrono::high_resolution_clock> m_start = {};
 
     /**
-     * @brief Clock to calculate the cpu time elasped.
+     * @brief Clock to calculate the elapsed cpu time.
      */
     std::clock_t m_cpu = 0;
   };
diff --git a/source/templates/Timer.h b/source/templates/Timer.h
index b72d9ee..432c7b6 100644
--- a/source/templates/Timer.h
+++ b/source/templates/Timer.h
@@ -49,7 +49,7 @@ namespace vx {
     /**
      * @brief Call a function after timeout.
      * @param _function   Call back function.
-     * @param _delay   Delay after the function is valled in milliseconds.
+     * @param _delay   Delay in milliseconds after the function is called.
      */
     template<typename Function>
     void setTimeout( Function _function, int _delay ) {
@@ -74,7 +74,7 @@ namespace vx {
     /**
      * @brief Call a function after interval.
      * @param _function   Call back function.
-     * @param _interval   Intervall after the function is called in milliseconds.
+     * @param _interval   Interval in milliseconds after the function is called.
      */
     template<typename Function>
     void setInterval( Function _function, int _interval ) {
@@ -100,7 +100,7 @@ namespace vx {
     }
 
     /**
-     * @brief Stoping the current timer to not exeecute the call back function.
+     * @brief Stopping the current timer to not execute the call back function.
      */
     inline void stop() { this->m_clear = true; }