diff --git a/src/OpenFOAM/matrices/Matrix/Matrix.C b/src/OpenFOAM/matrices/Matrix/Matrix.C
index 3937f9cb1e..d06cef41e6 100644
--- a/src/OpenFOAM/matrices/Matrix/Matrix.C
+++ b/src/OpenFOAM/matrices/Matrix/Matrix.C
@@ -30,14 +30,14 @@ License
 template<class Form, class Type>
 void Foam::Matrix<Form, Type>::allocate()
 {
-    if (n_ && m_)
+    if (nRows_ && nCols_)
     {
-        v_ = new Type*[n_];
-        v_[0] = new Type[n_*m_];
+        v_ = new Type*[nRows_];
+        v_[0] = new Type[nRows_*nCols_];
 
-        for (label i=1; i<n_; i++)
+        for (label i=1; i<nRows_; i++)
         {
-            v_[i] = v_[i-1] + m_;
+            v_[i] = v_[i-1] + nCols_;
         }
     }
 }
@@ -61,14 +61,14 @@ Foam::Matrix<Form, Type>::~Matrix()
 template<class Form, class Type>
 Foam::Matrix<Form, Type>::Matrix(const label n, const label m)
 :
-    n_(n),
-    m_(m),
+    nRows_(n),
+    nCols_(m),
     v_(NULL)
 {
-    if (n_ < 0 || m_ < 0)
+    if (nRows_ < 0 || nCols_ < 0)
     {
         FatalErrorInFunction
-            << "bad n, m " << n_ << ", " << m_
+            << "bad n, m " << nRows_ << ", " << nCols_
             << abort(FatalError);
     }
 
@@ -79,14 +79,14 @@ Foam::Matrix<Form, Type>::Matrix(const label n, const label m)
 template<class Form, class Type>
 Foam::Matrix<Form, Type>::Matrix(const label n, const label m, const Type& a)
 :
-    n_(n),
-    m_(m),
+    nRows_(n),
+    nCols_(m),
     v_(NULL)
 {
-    if (n_ < 0 || m_ < 0)
+    if (nRows_ < 0 || nCols_ < 0)
     {
         FatalErrorInFunction
-            << "bad n, m " << n_ << ", " << m_
+            << "bad n, m " << nRows_ << ", " << nCols_
             << abort(FatalError);
     }
 
@@ -96,7 +96,7 @@ Foam::Matrix<Form, Type>::Matrix(const label n, const label m, const Type& a)
     {
         Type* v = v_[0];
 
-        label nm = n_*m_;
+        label nm = nRows_*nCols_;
 
         for (label i=0; i<nm; i++)
         {
@@ -109,8 +109,8 @@ Foam::Matrix<Form, Type>::Matrix(const label n, const label m, const Type& a)
 template<class Form, class Type>
 Foam::Matrix<Form, Type>::Matrix(const Matrix<Form, Type>& a)
 :
-    n_(a.n_),
-    m_(a.m_),
+    nRows_(a.nRows_),
+    nCols_(a.nCols_),
     v_(NULL)
 {
     if (a.v_)
@@ -119,7 +119,7 @@ Foam::Matrix<Form, Type>::Matrix(const Matrix<Form, Type>& a)
         Type* v = v_[0];
         const Type* av = a.v_[0];
 
-        label nm = n_*m_;
+        label nm = nRows_*nCols_;
         for (label i=0; i<nm; i++)
         {
             v[i] = av[i];
@@ -136,8 +136,8 @@ void Foam::Matrix<Form, Type>::clear()
         delete[] (v_[0]);
         delete[] v_;
     }
-    n_ = 0;
-    m_ = 0;
+    nRows_ = 0;
+    nCols_ = 0;
     v_ = NULL;
 }
 
@@ -147,11 +147,11 @@ void Foam::Matrix<Form, Type>::transfer(Matrix<Form, Type>& a)
 {
     clear();
 
-    n_ = a.n_;
-    a.n_ = 0;
+    nRows_ = a.nRows_;
+    a.nRows_ = 0;
 
-    m_ = a.m_;
-    a.m_ = 0;
+    nCols_ = a.nCols_;
+    a.nCols_ = 0;
 
     v_ = a.v_;
     a.v_ = NULL;
@@ -185,7 +185,7 @@ void Foam::Matrix<Form, Type>::operator=(const Type& t)
     {
         Type* v = v_[0];
 
-        label nm = n_*m_;
+        label nm = nRows_*nCols_;
         for (label i=0; i<nm; i++)
         {
             v[i] = t;
@@ -204,11 +204,11 @@ void Foam::Matrix<Form, Type>::operator=(const Matrix<Form, Type>& a)
             << abort(FatalError);
     }
 
-    if (n_ != a.n_ || m_ != a.m_)
+    if (nRows_ != a.nRows_ || nCols_ != a.nCols_)
     {
         clear();
-        n_ = a.n_;
-        m_ = a.m_;
+        nRows_ = a.nRows_;
+        nCols_ = a.nCols_;
         allocate();
     }
 
@@ -217,7 +217,7 @@ void Foam::Matrix<Form, Type>::operator=(const Matrix<Form, Type>& a)
         Type* v = v_[0];
         const Type* av = a.v_[0];
 
-        label nm = n_*m_;
+        label nm = nRows_*nCols_;
         for (label i=0; i<nm; i++)
         {
             v[i] = av[i];
diff --git a/src/OpenFOAM/matrices/Matrix/Matrix.H b/src/OpenFOAM/matrices/Matrix/Matrix.H
index 8455ac997f..87652bdd6b 100644
--- a/src/OpenFOAM/matrices/Matrix/Matrix.H
+++ b/src/OpenFOAM/matrices/Matrix/Matrix.H
@@ -76,7 +76,7 @@ class Matrix
     // Private data
 
         //- Number of rows and columns in Matrix.
-        label n_, m_;
+        label nRows_, nCols_;
 
         //- Row pointers
         Type** __restrict__ v_;
diff --git a/src/OpenFOAM/matrices/Matrix/MatrixI.H b/src/OpenFOAM/matrices/Matrix/MatrixI.H
index 613285c707..5286b98f42 100644
--- a/src/OpenFOAM/matrices/Matrix/MatrixI.H
+++ b/src/OpenFOAM/matrices/Matrix/MatrixI.H
@@ -28,8 +28,8 @@ License
 template<class Form, class Type>
 inline Foam::Matrix<Form, Type>::Matrix()
 :
-    n_(0),
-    m_(0),
+    nRows_(0),
+    nCols_(0),
     v_(NULL)
 {}
 
@@ -55,37 +55,37 @@ inline const Foam::Matrix<Form, Type>& Foam::Matrix<Form, Type>::null()
 template<class Form, class Type>
 inline Foam::label Foam::Matrix<Form, Type>::n() const
 {
-    return n_;
+    return nRows_;
 }
 
 
 template<class Form, class Type>
 inline Foam::label Foam::Matrix<Form, Type>::m() const
 {
-    return m_;
+    return nCols_;
 }
 
 
 template<class Form, class Type>
 inline Foam::label Foam::Matrix<Form, Type>::size() const
 {
-    return n_*m_;
+    return nRows_*nCols_;
 }
 
 
 template<class Form, class Type>
 inline void Foam::Matrix<Form, Type>::checki(const label i) const
 {
-    if (!n_)
+    if (!nRows_)
     {
         FatalErrorInFunction
             << "attempt to access element from zero sized row"
             << abort(FatalError);
     }
-    else if (i<0 || i>=n_)
+    else if (i<0 || i>=nRows_)
     {
         FatalErrorInFunction
-            << "index " << i << " out of range 0 ... " << n_-1
+            << "index " << i << " out of range 0 ... " << nRows_-1
             << abort(FatalError);
     }
 }
@@ -94,16 +94,16 @@ inline void Foam::Matrix<Form, Type>::checki(const label i) const
 template<class Form, class Type>
 inline void Foam::Matrix<Form, Type>::checkj(const label j) const
 {
-    if (!m_)
+    if (!nCols_)
     {
         FatalErrorInFunction
             << "attempt to access element from zero sized column"
             << abort(FatalError);
     }
-    else if (j<0 || j>=m_)
+    else if (j<0 || j>=nCols_)
     {
         FatalErrorInFunction
-            << "index " << j << " out of range 0 ... " << m_-1
+            << "index " << j << " out of range 0 ... " << nCols_-1
             << abort(FatalError);
     }
 }
diff --git a/src/OpenFOAM/matrices/Matrix/MatrixIO.C b/src/OpenFOAM/matrices/Matrix/MatrixIO.C
index 8c52bdebc5..60df684937 100644
--- a/src/OpenFOAM/matrices/Matrix/MatrixIO.C
+++ b/src/OpenFOAM/matrices/Matrix/MatrixIO.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -34,8 +34,8 @@ License
 template<class Form, class Type>
 Foam::Matrix<Form, Type>::Matrix(Istream& is)
 :
-    n_(0),
-    m_(0),
+    nRows_(0),
+    nCols_(0),
     v_(NULL)
 {
     operator>>(is, *this);
@@ -59,10 +59,10 @@ Foam::Istream& Foam::operator>>(Istream& is, Matrix<Form, Type>& M)
 
     if (firstToken.isLabel())
     {
-        M.n_ = firstToken.labelToken();
-        M.m_ = readLabel(is);
+        M.nRows_ = firstToken.labelToken();
+        M.nCols_ = readLabel(is);
 
-        label nm = M.n_*M.m_;
+        label nm = M.nRows_*M.nCols_;
 
         // Read list contents depending on data format
         if (is.format() == IOstream::ASCII || !contiguous<Type>())
@@ -151,7 +151,7 @@ Foam::Istream& Foam::operator>>(Istream& is, Matrix<Form, Type>& M)
 template<class Form, class Type>
 Foam::Ostream& Foam::operator<<(Ostream& os, const Matrix<Form, Type>& M)
 {
-    label nm = M.n_*M.m_;
+    label nm = M.nRows_*M.nCols_;
 
     os  << M.n() << token::SPACE << M.m();