diff --git a/src/OSspecific/POSIX/clockTime/clockTime.C b/src/OSspecific/POSIX/clockTime/clockTime.C
index 31a6d2c4bd..3c65d023ff 100644
--- a/src/OSspecific/POSIX/clockTime/clockTime.C
+++ b/src/OSspecific/POSIX/clockTime/clockTime.C
@@ -24,38 +24,25 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "clockTime.H"
-#include "scalar.H"
 #include <sys/time.h>
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-
-// * * * * * * * * * * * * * * * Static Members  * * * * * * * * * * * * * * //
-
-
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
-void clockTime::getTime(struct timeval& t)
+void Foam::clockTime::getTime(timeType& t)
 {
-    gettimeofday(&t, NULL);
+    gettimeofday(&t, 0);
 }
 
 
-double clockTime::timeDifference
-(
-    const struct timeval& start,
-    const struct timeval& end
-)
+double Foam::clockTime::timeDifference(const timeType& beg, const timeType& end)
 {
-    return end.tv_sec - start.tv_sec + 1E-6*(end.tv_usec - start.tv_usec);
+    return end.tv_sec - beg.tv_sec + 1E-6*(end.tv_usec - beg.tv_usec);
 }
 
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-clockTime::clockTime()
+Foam::clockTime::clockTime()
 {
     getTime(startTime_);
     lastTime_ = startTime_;
@@ -65,14 +52,14 @@ clockTime::clockTime()
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-double clockTime::elapsedTime() const
+double Foam::clockTime::elapsedTime() const
 {
     getTime(newTime_);
     return timeDifference(startTime_, newTime_);
 }
 
 
-double clockTime::timeIncrement() const
+double Foam::clockTime::timeIncrement() const
 {
     lastTime_ = newTime_;
     getTime(newTime_);
@@ -80,8 +67,4 @@ double clockTime::timeIncrement() const
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OSspecific/POSIX/clockTime/clockTime.H b/src/OSspecific/POSIX/clockTime/clockTime.H
index 5237233f05..c8bbbdba6c 100644
--- a/src/OSspecific/POSIX/clockTime/clockTime.H
+++ b/src/OSspecific/POSIX/clockTime/clockTime.H
@@ -44,43 +44,45 @@ namespace Foam
 {
 
 /*---------------------------------------------------------------------------*\
-                           Class clockTime Declaration
+                          Class clockTime Declaration
 \*---------------------------------------------------------------------------*/
 
 class clockTime
 {
     // Private data
 
-        struct timeval startTime_;
-        mutable struct timeval lastTime_;
-        mutable struct timeval newTime_;
+        //- Time structure used
+        typedef struct timeval timeType;
 
-        static void getTime(struct timeval& t);
+        timeType startTime_;
 
-        static double timeDifference
-        (
-            const struct timeval& start,
-            const struct timeval& end
-        );
+        mutable timeType lastTime_;
+        mutable timeType newTime_;
+
+    // Private Member Functions
+
+        //- Retrieve the current time values from the system
+        static void getTime(timeType&);
+
+        //- Difference between two times
+        static double timeDifference(const timeType& beg, const timeType& end);
 
 
 public:
 
     // Constructors
 
-        //- Construct from components
+        //- Construct with the current clock time
         clockTime();
 
 
     // Member Functions
 
-        // Access
+        //- Return time (in seconds) from the start
+        double elapsedTime() const;
 
-            //- Returns CPU time from start of run
-            double elapsedTime() const;
-
-            //- Returns CPU time from last call of clockTimeIncrement()
-            double timeIncrement() const;
+        //- Return time (in seconds) since last call to timeIncrement()
+        double timeIncrement() const;
 };
 
 
diff --git a/src/OSspecific/POSIX/cpuTime/cpuTime.C b/src/OSspecific/POSIX/cpuTime/cpuTime.C
index b5ef0c4283..5af53026fd 100644
--- a/src/OSspecific/POSIX/cpuTime/cpuTime.C
+++ b/src/OSspecific/POSIX/cpuTime/cpuTime.C
@@ -21,45 +21,32 @@ License
     You should have received a copy of the GNU General Public License
     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
-Description
-    Starts timing CPU usage and return elapsed time from start.
-
 \*---------------------------------------------------------------------------*/
 
 #include "cpuTime.H"
-
 #include <unistd.h>
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-
 // * * * * * * * * * * * * * * * Static Members  * * * * * * * * * * * * * * //
 
-long cpuTime::Hz_(sysconf(_SC_CLK_TCK));
+const long Foam::cpuTime::Hz_(sysconf(_SC_CLK_TCK));
 
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
-void cpuTime::getTime(struct tms& t)
+void Foam::cpuTime::getTime(timeType& t)
 {
     times(&t);
 }
 
 
-double cpuTime::timeDifference
-(
-    const struct tms& start,
-    const struct tms& end
-)
+double Foam::cpuTime::timeDifference(const timeType& beg, const timeType& end)
 {
     return
     (
         double
         (
             (end.tms_utime + end.tms_stime)
-          - (start.tms_utime + start.tms_stime)
+          - (beg.tms_utime + beg.tms_stime)
         )/Hz_
     );
 }
@@ -67,7 +54,7 @@ double cpuTime::timeDifference
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
-cpuTime::cpuTime()
+Foam::cpuTime::cpuTime()
 {
     getTime(startTime_);
     lastTime_ = startTime_;
@@ -77,14 +64,14 @@ cpuTime::cpuTime()
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
-double cpuTime::elapsedCpuTime() const
+double Foam::cpuTime::elapsedCpuTime() const
 {
     getTime(newTime_);
     return timeDifference(startTime_, newTime_);
 }
 
 
-double cpuTime::cpuTimeIncrement() const
+double Foam::cpuTime::cpuTimeIncrement() const
 {
     lastTime_ = newTime_;
     getTime(newTime_);
@@ -92,8 +79,4 @@ double cpuTime::cpuTimeIncrement() const
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //
diff --git a/src/OSspecific/POSIX/cpuTime/cpuTime.H b/src/OSspecific/POSIX/cpuTime/cpuTime.H
index e3a6376360..33e3259304 100644
--- a/src/OSspecific/POSIX/cpuTime/cpuTime.H
+++ b/src/OSspecific/POSIX/cpuTime/cpuTime.H
@@ -54,38 +54,41 @@ class cpuTime
 {
     // Private data
 
-        static long Hz_;
+        //- Time structure used
+        typedef struct tms timeType;
 
-        struct tms startTime_;
-        mutable struct tms lastTime_;
-        mutable struct tms newTime_;
+        //- Clock-ticks per second
+        static const long Hz_;
 
-        static void getTime(struct tms& t);
+        //- The start time
+        timeType startTime_;
+        mutable timeType lastTime_;
+        mutable timeType newTime_;
 
-        static double timeDifference
-        (
-            const struct tms& start,
-            const struct tms& end
-        );
+    // Private Member Functions
+
+        //- Retrieve the current time values from the system
+        static void getTime(timeType&);
+
+        //- Difference between two times
+        static double timeDifference(const timeType& beg, const timeType& end);
 
 
 public:
 
     // Constructors
 
-        //- Construct from components
+        //- Construct with the current clock time
         cpuTime();
 
 
     // Member Functions
 
-        // Access
+        //- Return CPU time (in seconds) from the start
+        double elapsedCpuTime() const;
 
-            //- Returns CPU time from start of run
-            double elapsedCpuTime() const;
-
-            //- Returns CPU time from last call of cpuTimeIncrement()
-            double cpuTimeIncrement() const;
+        //- Return CPU time (in seconds) since last call to cpuTimeIncrement()
+        double cpuTimeIncrement() const;
 };