diff --git a/src/conversion/common/reader/meshReader.C b/src/conversion/common/reader/meshReader.C
index ac96dfbeba..2a20ed6911 100644
--- a/src/conversion/common/reader/meshReader.C
+++ b/src/conversion/common/reader/meshReader.C
@@ -52,7 +52,7 @@ void Foam::meshReader::addFaceZones(polyMesh& mesh) const
     }
 
     nZone = 0;
-    forAllConstIter(HashTable<labelList>, monitoringSets_, iter)
+    forAllConstIters(monitoringSets_, iter)
     {
         Info<< "faceZone " << nZone
             << " (size: " << iter().size() << ") name: "
diff --git a/src/conversion/common/reader/meshReaderAux.C b/src/conversion/common/reader/meshReaderAux.C
index 55cabd1c5f..8741ada126 100644
--- a/src/conversion/common/reader/meshReaderAux.C
+++ b/src/conversion/common/reader/meshReaderAux.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2010, 2019 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
                             | Copyright (C) 2011-2017 OpenFOAM Foundation
@@ -41,26 +41,26 @@ void Foam::meshReader::warnDuplicates
     HashTable<label> hashed(list.size());
     bool duplicates = false;
 
-    forAll(list, listI)
+    for (const word& w : list)
     {
-        // check duplicate name
-        HashTable<label>::iterator iter = hashed.find(list[listI]);
-        if (iter != hashed.end())
+        // Check duplicate name
+        auto iter = hashed.find(w);
+        if (iter.found())
         {
-            (*iter)++;
+            ++(*iter);
             duplicates = true;
         }
         else
         {
-            hashed.insert(list[listI], 1);
+            hashed.insert(w, 1);
         }
     }
 
-    // warn about duplicate names
+    // Warn about duplicate names
     if (duplicates)
     {
         Info<< nl << "WARNING: " << context << " with identical names:";
-        forAllConstIter(HashTable<label>, hashed, iter)
+        forAllConstIters(hashed, iter)
         {
             if (*iter > 1)
             {
diff --git a/src/conversion/common/tables/boundaryRegion.C b/src/conversion/common/tables/boundaryRegion.C
index 7e68694c7b..d578f8fa05 100644
--- a/src/conversion/common/tables/boundaryRegion.C
+++ b/src/conversion/common/tables/boundaryRegion.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2010, 2019 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
                             | Copyright (C) 2011 OpenFOAM Foundation
@@ -55,7 +55,7 @@ Foam::boundaryRegion::boundaryRegion
 Foam::label Foam::boundaryRegion::append(const dictionary& dict)
 {
     label maxId = -1;
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         if (maxId < iter.key())
         {
@@ -72,7 +72,7 @@ Foam::Map<Foam::word> Foam::boundaryRegion::names() const
 {
     Map<word> lookup;
 
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         lookup.insert
         (
@@ -96,7 +96,7 @@ Foam::Map<Foam::word> Foam::boundaryRegion::names
 {
     Map<word> lookup;
 
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         const word lookupName = iter().lookupOrDefault<word>
         (
@@ -118,7 +118,7 @@ Foam::Map<Foam::word> Foam::boundaryRegion::boundaryTypes() const
 {
     Map<word> lookup;
 
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         lookup.insert
         (
@@ -138,7 +138,7 @@ Foam::label Foam::boundaryRegion::findIndex(const word& name) const
         return -1;
     }
 
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         if (iter().lookupOrDefault<word>("Label", word::null) == name)
         {
@@ -258,18 +258,18 @@ void Foam::boundaryRegion::rename(const dictionary& mapDict)
     // This avoid re-matching any renamed regions
 
     Map<word> mapping;
-    forAllConstIter(dictionary, mapDict, iter)
+    for (const entry& dEntry : mapDict)
     {
-        word oldName(iter().stream());
+        const word oldName(dEntry.stream());
 
-        label id = this->findIndex(oldName);
+        const label id = this->findIndex(oldName);
         if (id >= 0)
         {
-            mapping.insert(id, iter().keyword());
+            mapping.insert(id, dEntry.keyword());
         }
     }
 
-    forAllConstIter(Map<word>, mapping, iter)
+    forAllConstIters(mapping, iter)
     {
         dictionary& dict = operator[](iter.key());
 
diff --git a/src/conversion/common/tables/cellTable.C b/src/conversion/common/tables/cellTable.C
index 2f7d3c44f9..e940b63eb5 100644
--- a/src/conversion/common/tables/cellTable.C
+++ b/src/conversion/common/tables/cellTable.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2004-2010 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2004-2010, 2019 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
                             | Copyright (C) 2011-2016 OpenFOAM Foundation
@@ -40,10 +40,10 @@ Foam::Map<Foam::label> Foam::cellTable::zoneMap() const
 {
     Map<label> lookup;
 
-    label zoneI = 0;
-    forAllConstIter(Map<dictionary>, *this, iter)
+    label zonei = 0;
+    forAllConstIters(*this, iter)
     {
-        lookup.insert(iter.key(), zoneI++);
+        lookup.insert(iter.key(), zonei++);
     }
 
     return lookup;
@@ -53,21 +53,21 @@ Foam::Map<Foam::label> Foam::cellTable::zoneMap() const
 Foam::wordList Foam::cellTable::namesList() const
 {
     Map<word> lookup = names();
-    wordList lst(lookup.size());
+    wordList list(lookup.size());
 
-    label zoneI = 0;
-    forAllConstIter(Map<word>, lookup, iter)
+    label zonei = 0;
+    forAllConstIters(lookup, iter)
     {
-        lst[zoneI++] = iter();
+        list[zonei++] = *iter;
     }
 
-    return lst;
+    return list;
 }
 
 
 void Foam::cellTable::addDefaults()
 {
-    forAllIter(Map<dictionary>, *this, iter)
+    forAllIters(*this, iter)
     {
         if (!iter().found("MaterialType"))
         {
@@ -88,7 +88,7 @@ void Foam::cellTable::setEntry
     dict.add(keyWord, value);
 
     iterator iter = find(id);
-    if (iter != end())
+    if (iter.found())
     {
         iter().merge(dict);
     }
@@ -125,7 +125,7 @@ Foam::cellTable::cellTable
 Foam::label Foam::cellTable::append(const dictionary& dict)
 {
     label maxId = -1;
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         if (maxId < iter.key())
         {
@@ -142,7 +142,7 @@ Foam::Map<Foam::word> Foam::cellTable::names() const
 {
     Map<word> lookup;
 
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         lookup.insert
         (
@@ -166,7 +166,7 @@ Foam::Map<Foam::word> Foam::cellTable::names
 {
     Map<word> lookup;
 
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         const word lookupName = iter().lookupOrDefault<word>
         (
@@ -188,8 +188,8 @@ Foam::word Foam::cellTable::name(const label id) const
 {
     word theName("cellTable_" + Foam::name(id));
 
-    const_iterator iter = find(id);
-    if (iter != end())
+    const_iterator iter = cfind(id);
+    if (iter.found())
     {
         iter().readIfPresent("Label", theName);
     }
@@ -205,7 +205,7 @@ Foam::label Foam::cellTable::findIndex(const word& name) const
         return -1;
     }
 
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         if (iter().lookupOrDefault<word>("Label", word::null) == name)
         {
@@ -221,7 +221,7 @@ Foam::Map<Foam::word> Foam::cellTable::materialTypes() const
 {
     Map<word> lookup;
 
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         lookup.insert
         (
@@ -238,7 +238,7 @@ Foam::Map<Foam::word> Foam::cellTable::selectType(const word& matl) const
 {
     Map<word> lookup;
 
-    forAllConstIter(Map<dictionary>, *this, iter)
+    forAllConstIters(*this, iter)
     {
         const label index = iter.key();
         const dictionary& dict = iter.val();
@@ -300,7 +300,7 @@ void Foam::cellTable::setName(const label id)
 {
     iterator iter = find(id);
 
-    if (iter == end() || !iter().found("Label"))
+    if (!iter.found() || !iter().found("Label"))
     {
         setName(id, "cellTable_" + Foam::name(id));
     }
@@ -446,10 +446,10 @@ void Foam::cellTable::addCellZones
 
     forAll(tableIds, celli)
     {
-        Map<label>::const_iterator iter = typeToZone.find(tableIds[celli]);
-        if (iter != typeToZone.end())
+        const auto iter = typeToZone.cfind(tableIds[celli]);
+        if (iter.found())
         {
-            zoneCells[iter()].append(celli);
+            zoneCells[*iter].append(celli);
         }
     }
 
@@ -513,13 +513,13 @@ void Foam::cellTable::combine(const dictionary& mapDict, labelList& tableIds)
     labelList mapping(identity(max(origNames.toc()) + 1));
 
     bool remap = false;
-    forAllConstIter(dictionary, mapDict, iter)
+    forAllConstIters(mapDict, iter)
     {
         wordRes patterns(iter().stream());
 
         // find all matches
         Map<word> matches;
-        forAllConstIter(Map<word>, origNames, namesIter)
+        forAllConstIters(origNames, namesIter)
         {
             if (patterns.match(namesIter()))
             {
@@ -554,7 +554,7 @@ void Foam::cellTable::combine(const dictionary& mapDict, labelList& tableIds)
             this->erase(matches);
             origNames.erase(matches);
 
-            forAllConstIter(Map<word>, matches, matchIter)
+            forAllConstIters(matches, matchIter)
             {
                 mapping[matchIter.key()] = targetId;
                 Info<< " " << matchIter();
diff --git a/src/fileFormats/sampledSetWriters/csv/csvSetWriter.C b/src/fileFormats/sampledSetWriters/csv/csvSetWriter.C
index a8154274e8..259d236a2d 100644
--- a/src/fileFormats/sampledSetWriters/csv/csvSetWriter.C
+++ b/src/fileFormats/sampledSetWriters/csv/csvSetWriter.C
@@ -140,7 +140,7 @@ namespace Foam
 
         forAll(valueSetNames, i)
         {
-            if (i > 0)
+            if (i)
             {
                 writeSeparator(os);
             }
@@ -166,7 +166,7 @@ void Foam::csvSetWriter<Type>::writeHeader
     {
         for (label j=0; j<Type::nComponents; j++)
         {
-            if (i>0 || j>0)
+            if (i || j)
             {
                 writeSeparator(os);
             }
@@ -189,12 +189,7 @@ void Foam::csvSetWriter<Type>::writeCoordHeader
 
     if (points.hasVectorAxis())
     {
-        for
-        (
-            word::const_iterator iter = axisName.begin();
-            iter != axisName.end();
-            ++iter
-        )
+        for (auto iter = axisName.cbegin(); iter != axisName.cend(); ++iter)
         {
             os << *iter;
             writeSeparator(os);
diff --git a/src/fileFormats/sampledSetWriters/gnuplot/gnuplotSetWriter.C b/src/fileFormats/sampledSetWriters/gnuplot/gnuplotSetWriter.C
index a6090028ba..f2ffabb6f1 100644
--- a/src/fileFormats/sampledSetWriters/gnuplot/gnuplotSetWriter.C
+++ b/src/fileFormats/sampledSetWriters/gnuplot/gnuplotSetWriter.C
@@ -85,7 +85,7 @@ void Foam::gnuplotSetWriter<Type>::write
 
     forAll(valueSets, i)
     {
-        if (i != 0)
+        if (i)
         {
             os << ',';
         }
diff --git a/src/fileFormats/sampledSetWriters/nastran/nastranSetWriter.C b/src/fileFormats/sampledSetWriters/nastran/nastranSetWriter.C
index 98a4c1a805..408ae6a1f6 100644
--- a/src/fileFormats/sampledSetWriters/nastran/nastranSetWriter.C
+++ b/src/fileFormats/sampledSetWriters/nastran/nastranSetWriter.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2018 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2018-2019 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -159,15 +159,12 @@ void Foam::nastranSetWriter<Type>::write
 //    }
 
     label globalPti = 0;
-    forAll(tracks, tracki)
+    for (const coordSet& points : tracks)
     {
-        const coordSet& points = tracks[tracki];
-        forAll(points, pointi)
+        for (const point& pt : points)
         {
             fileFormats::NASCore::writeKeyword(os, "GRID", fieldFormat::FREE);
 
-            const point& pt = points[pointi];
-
             //os.setf(std::ios_base::right);
             //os  << setw(8) << globalPti++
             //    << setw(8) << ' '
@@ -190,10 +187,8 @@ void Foam::nastranSetWriter<Type>::write
         // Write ids of track points to file
         label globalEdgei = 0;
         label globalPointi = 0;
-        forAll(tracks, tracki)
+        for (const coordSet& points : tracks)
         {
-            const coordSet& points = tracks[tracki];
-
             const label nEdges = points.size()-1;
             for (label edgei = 0; edgei < nEdges; ++edgei)
             {
diff --git a/src/fileFormats/sampledSetWriters/vtk/vtkSetWriter.C b/src/fileFormats/sampledSetWriters/vtk/vtkSetWriter.C
index 9fbef1d443..05ced9df74 100644
--- a/src/fileFormats/sampledSetWriters/vtk/vtkSetWriter.C
+++ b/src/fileFormats/sampledSetWriters/vtk/vtkSetWriter.C
@@ -95,7 +95,7 @@ void Foam::vtkSetWriter<Type>::write
 
         forAll(fld, pointi)
         {
-            if (pointi != 0)
+            if (pointi)
             {
                 os  << ' ';
             }
@@ -137,9 +137,8 @@ void Foam::vtkSetWriter<Type>::write
         << "DATASET POLYDATA" << nl
         << "POINTS " << nPoints << " double" << nl;
 
-    forAll(tracks, trackI)
+    for (const coordSet& points : tracks)
     {
-        const coordSet& points = tracks[trackI];
         for (const point& pt : points)
         {
             os  << float(pt.x()) << ' '
@@ -158,11 +157,13 @@ void Foam::vtkSetWriter<Type>::write
         {
             const coordSet& points = tracks[trackI];
 
-            os  << points.size();
-            forAll(points, i)
+            const label len = points.size();
+
+            os  << len;
+            for (label i = 0; i < len; ++i)
             {
                 os  << ' ' << globalPtI;
-                globalPtI++;
+                ++globalPtI;
             }
             os << nl;
         }
@@ -179,13 +180,11 @@ void Foam::vtkSetWriter<Type>::write
 
         const List<Field<Type>>& fieldVals = valueSets[setI];
 
-        forAll(fieldVals, i)
+        for (const Field<Type>& vals : fieldVals)
         {
-            const Field<Type>& vals = fieldVals[i];
-
             forAll(vals, j)
             {
-                if (j != 0)
+                if (j)
                 {
                     os  << ' ';
                 }
diff --git a/src/fileFormats/vtk/part/foamVtuSizingTemplates.C b/src/fileFormats/vtk/part/foamVtuSizingTemplates.C
index 0121d04340..1cfc959371 100644
--- a/src/fileFormats/vtk/part/foamVtuSizingTemplates.C
+++ b/src/fileFormats/vtk/part/foamVtuSizingTemplates.C
@@ -622,14 +622,14 @@ void Foam::vtk::vtuSizing::populateArrays
             if (sizing.nFaceLabels())
             {
                 // End face offsets, leaving -1 untouched
-                label prev = 0;
-                forAll(faceOffset, i)
+                LabelType prev = 0;
+                for (LabelType& off : faceOffset)
                 {
-                    const label sz = faceOffset[i];
+                    const auto sz = off;
                     if (sz > 0)
                     {
                         prev += sz;
-                        faceOffset[i] = prev;
+                        off = prev;
                     }
                 }
             }
@@ -639,10 +639,10 @@ void Foam::vtk::vtuSizing::populateArrays
         {
             // Has prefix, determine begin offsets
             label beg = 0;
-            forAll(vertOffset, i)
+            for (LabelType& off : vertOffset)
             {
-                const label sz = vertOffset[i];
-                vertOffset[i] = beg;
+                const auto sz = off;
+                off = beg;
                 beg += 1 + sz;
             }
 
@@ -650,12 +650,12 @@ void Foam::vtk::vtuSizing::populateArrays
             if (sizing.nFaceLabels())
             {
                 beg = 0;
-                forAll(faceOffset, i)
+                for (LabelType& off : faceOffset)
                 {
-                    const label sz = faceOffset[i];
+                    const auto sz = off;
                     if (sz > 0)
                     {
-                        faceOffset[i] = beg;
+                        off = beg;
                         beg += sz;
                     }
                 }
diff --git a/src/fileFormats/vtk/read/vtkUnstructuredReader.C b/src/fileFormats/vtk/read/vtkUnstructuredReader.C
index 6a6386a284..83be3f4154 100644
--- a/src/fileFormats/vtk/read/vtkUnstructuredReader.C
+++ b/src/fileFormats/vtk/read/vtkUnstructuredReader.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2018 OpenCFD Ltd.
+    \\  /    A nd           | Copyright (C) 2018-2019 OpenCFD Ltd.
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
                             | Copyright (C) 2012-2016 OpenFOAM Foundation
@@ -186,9 +186,9 @@ void Foam::vtkUnstructuredReader::extractCells
                 lineMap_[lineI] = i;
                 labelList& segment = lines_[lineI++];
                 segment.setSize(nRead);
-                forAll(segment, i)
+                for (label& pointi : segment)
                 {
-                    segment[i] = cellVertData[dataIndex++];
+                    pointi = cellVertData[dataIndex++];
                 }
             }
             break;
@@ -236,9 +236,9 @@ void Foam::vtkUnstructuredReader::extractCells
                 face& f = faces_[facei++];
                 label nRead = cellVertData[dataIndex++];
                 f.setSize(nRead);
-                forAll(f, fp)
+                for (label& pointi : f)
                 {
-                    f[fp] = cellVertData[dataIndex++];
+                    pointi = cellVertData[dataIndex++];
                 }
             }
             break;
@@ -398,9 +398,9 @@ void Foam::vtkUnstructuredReader::readField
                 inFile.getLine(fieldVals()[0]);
 
                 // Read without parsing
-                forAll(fieldVals(), i)
+                for (string& s : fieldVals())
                 {
-                    inFile.getLine(fieldVals()[i]);
+                    inFile.getLine(s);
                 }
                 regIOobject::store(fieldVals);
             }
@@ -627,9 +627,9 @@ void Foam::vtkUnstructuredReader::read(ISstream& inFile)
                 lineMap_[lineI] = lineI;
                 labelList& f = lines_[lineI];
                 f.setSize(lineVerts[elemI++]);
-                forAll(f, fp)
+                for (label& pointi : f)
                 {
-                    f[fp] = lineVerts[elemI++];
+                    pointi = lineVerts[elemI++];
                 }
                 lineI++;
             }
@@ -656,9 +656,9 @@ void Foam::vtkUnstructuredReader::read(ISstream& inFile)
                 faceMap_[facei] = facei;
                 face& f = faces_[facei];
                 f.setSize(faceVerts[elemI++]);
-                forAll(f, fp)
+                for (label& pointi : f)
                 {
-                    f[fp] = faceVerts[elemI++];
+                    pointi = faceVerts[elemI++];
                 }
                 facei++;
             }
@@ -769,11 +769,11 @@ void Foam::vtkUnstructuredReader::read(ISstream& inFile)
                 );
 
                 label elemI = 0;
-                forAll(fieldVals(), i)
+                for (vector& val : fieldVals())
                 {
-                    fieldVals()[i].x() = s[elemI++];
-                    fieldVals()[i].y() = s[elemI++];
-                    fieldVals()[i].z() = s[elemI++];
+                    val.x() = s[elemI++];
+                    val.y() = s[elemI++];
+                    val.z() = s[elemI++];
                 }
                 regIOobject::store(fieldVals);
             }