--- old/Root/documentation/spectrum/Spectrum.md	2015-10-02 16:27:51.000000000 +0200
+++ new/Root/documentation/spectrum/Spectrum.md	2015-10-21 13:26:39.268809887 +0200
@@ -1196,7 +1196,7 @@
    double s_calc;
    double s_err;
    bool fix_s;
-   double a0_init;   // backgroud is estimated as a0+a1*x+a2*x*x
+   double a0_init;   // background is estimated as a0+a1*x+a2*x*x
    double a0_calc;
    double a0_err;
    bool fix_a0;
@@ -1477,7 +1477,7 @@
    double by_calc;
    double by_err;
    bool fix_by;
-   double a0_init;      // backgroud is estimated as a0+ax*x+ay*y
+   double a0_init;      // background is estimated as a0+ax*x+ay*y
    double a0_calc;
    double a0_err;
    bool fix_a0;
--- old/Root/hist/spectrum/inc/TSpectrum2Fit.h	2015-10-02 16:27:51.000000000 +0200
+++ new/Root/hist/spectrum/inc/TSpectrum2Fit.h	2015-10-21 13:26:39.272809930 +0200
@@ -97,13 +97,13 @@
    Double_t  fByInit;                        //initial value of b parameter for 1D ridges in y direction (slope), for details see html manual and references
    Double_t  fByCalc;                        //calculated value of b parameter for 1D ridges in y direction
    Double_t  fByErr;                         //error value of b parameter for 1D ridges in y direction
-   Double_t  fA0Init;                        //initial value of background a0 parameter(backgroud is estimated as a0+ax*x+ay*y)
+   Double_t  fA0Init;                        //initial value of background a0 parameter(background is estimated as a0+ax*x+ay*y)
    Double_t  fA0Calc;                        //calculated value of background a0 parameter
    Double_t  fA0Err;                         //error value of background a0 parameter
-   Double_t  fAxInit;                        //initial value of background ax parameter(backgroud is estimated as a0+ax*x+ay*y)
+   Double_t  fAxInit;                        //initial value of background ax parameter(background is estimated as a0+ax*x+ay*y)
    Double_t  fAxCalc;                        //calculated value of background ax parameter
    Double_t  fAxErr;                         //error value of background ax parameter
-   Double_t  fAyInit;                        //initial value of background ay parameter(backgroud is estimated as a0+ax*x+ay*y)
+   Double_t  fAyInit;                        //initial value of background ay parameter(background is estimated as a0+ax*x+ay*y)
    Double_t  fAyCalc;                        //calculated value of background ay parameter
    Double_t  fAyErr;                         //error value of background ay parameter   
    Bool_t   *fFixPositionX;                  //[fNPeaks] array of logical values which allow to fix appropriate x positions of 2D peaks (not fit). However they are present in the estimated functional
--- old/Root/hist/spectrum/inc/TSpectrumFit.h	2015-10-02 16:27:51.000000000 +0200
+++ new/Root/hist/spectrum/inc/TSpectrumFit.h	2015-10-21 13:26:39.276809973 +0200
@@ -61,13 +61,13 @@
    Double_t  fSInit;                     //initial value of s parameter (relative amplitude of step), for details see html manual and references
    Double_t  fSCalc;                     //calculated value of s parameter
    Double_t  fSErr;                      //error value of s parameter
-   Double_t  fA0Init;                    //initial value of background a0 parameter(backgroud is estimated as a0+a1*x+a2*x*x)
+   Double_t  fA0Init;                    //initial value of background a0 parameter(background is estimated as a0+a1*x+a2*x*x)
    Double_t  fA0Calc;                    //calculated value of background a0 parameter
    Double_t  fA0Err;                     //error value of background a0 parameter
-   Double_t  fA1Init;                    //initial value of background a1 parameter(backgroud is estimated as a0+a1*x+a2*x*x)
+   Double_t  fA1Init;                    //initial value of background a1 parameter(background is estimated as a0+a1*x+a2*x*x)
    Double_t  fA1Calc;                    //calculated value of background a1 parameter
    Double_t  fA1Err;                     //error value of background a1 parameter
-   Double_t  fA2Init;                    //initial value of background a2 parameter(backgroud is estimated as a0+a1*x+a2*x*x)
+   Double_t  fA2Init;                    //initial value of background a2 parameter(background is estimated as a0+a1*x+a2*x*x)
    Double_t  fA2Calc;                    //calculated value of background a2 parameter
    Double_t  fA2Err;                     //error value of background a2 parameter
    Bool_t   *fFixPosition;               //[fNPeaks] array of logical values which allow to fix appropriate positions (not fit). However they are present in the estimated functional   
--- old/Root/hist/spectrum/src/TSpectrum2Fit.cxx	2015-10-02 16:27:51.000000000 +0200
+++ new/Root/hist/spectrum/src/TSpectrum2Fit.cxx	2015-10-21 13:26:39.280810016 +0200
@@ -2085,7 +2085,7 @@
 direction</span></p>
 
 <p class=MsoNormal><span style='font-size:10.0pt'>   Double_t 
-fA0Init;                        //initial value of background a0 parameter(backgroud
+fA0Init;                        //initial value of background a0 parameter(background
 is estimated as a0+ax*x+ay*y)</span></p>
 
 <p class=MsoNormal><span style='font-size:10.0pt'>   Double_t 
@@ -2095,7 +2095,7 @@
 fA0Err;                         //error value of background a0 parameter</span></p>
 
 <p class=MsoNormal><span style='font-size:10.0pt'>   Double_t  fAxInit;        
-               //initial value of background ax parameter(backgroud is
+               //initial value of background ax parameter(background is
 estimated as a0+ax*x+ay*y)</span></p>
 
 <p class=MsoNormal><span style='font-size:10.0pt'>   Double_t 
@@ -2106,7 +2106,7 @@
 
 <p class=MsoNormal><span style='font-size:10.0pt'>   Double_t 
 fAyInit;                        //initial value of background ay
-parameter(backgroud is estimated as a0+ax*x+ay*y)</span></p>
+parameter(background is estimated as a0+ax*x+ay*y)</span></p>
 
 <p class=MsoNormal><span style='font-size:10.0pt'>   Double_t 
 fAyCalc;                        //calculated value of background ay parameter</span></p>
@@ -6589,7 +6589,7 @@
 //   SETTER FUNCTION                                                      
 //                                                     
 //   This function sets the following fitting parameters of background:
-//         -a0Init - initial value of a0 parameter (backgroud is estimated as a0+ax*x+ay*y)
+//         -a0Init - initial value of a0 parameter (background is estimated as a0+ax*x+ay*y)
 //         -fixA0 - logical value of a0 parameter, which allows to fix the parameter (not to fit)  
 //         -axInit - initial value of ax parameter
 //         -fixAx - logical value of ax parameter, which allows to fix the parameter (not to fit)   
--- old/Root/hist/spectrum/src/TSpectrumFit.cxx	2015-10-02 16:27:51.000000000 +0200
+++ new/Root/hist/spectrum/src/TSpectrumFit.cxx	2015-10-21 13:26:39.288810102 +0200
@@ -1009,7 +1009,7 @@
 
 <p class=MsoNormal style='text-align:justify'><span style='font-size:10.0pt'>  
 Double_t  fA0Init;                    //initial value of background a0
-parameter(backgroud is estimated as a0+a1*x+a2*x*x)</span></p>
+parameter(background is estimated as a0+a1*x+a2*x*x)</span></p>
 
 <p class=MsoNormal style='text-align:justify'><span style='font-size:10.0pt'>  
 Double_t  fA0Calc;                    //calculated value of background a0
@@ -1020,7 +1020,7 @@
 
 <p class=MsoNormal style='text-align:justify'><span style='font-size:10.0pt'>  
 Double_t  fA1Init;                    //initial value of background a1
-parameter(backgroud is estimated as a0+a1*x+a2*x*x)</span></p>
+parameter(background is estimated as a0+a1*x+a2*x*x)</span></p>
 
 <p class=MsoNormal style='text-align:justify'><span style='font-size:10.0pt'>  
 Double_t  fA1Calc;                    //calculated value of background a1
@@ -1031,7 +1031,7 @@
 
 <p class=MsoNormal style='text-align:justify'><span style='font-size:10.0pt'>  
 Double_t  fA2Init;                    //initial value of background a2
-parameter(backgroud is estimated as a0+a1*x+a2*x*x)</span></p>
+parameter(background is estimated as a0+a1*x+a2*x*x)</span></p>
 
 <p class=MsoNormal style='text-align:justify'><span style='font-size:10.0pt'>  
 Double_t  fA2Calc;                    //calculated value of background a2
@@ -3343,7 +3343,7 @@
 //   SETTER FUNCTION                                                      
 //                                                     
 //   This function sets the following fitting parameters of background:
-//         -a0Init - initial value of a0 parameter (backgroud is estimated as a0+a1*x+a2*x*x)
+//         -a0Init - initial value of a0 parameter (background is estimated as a0+a1*x+a2*x*x)
 //         -fixA0 - logical value of a0 parameter, which allows to fix the parameter (not to fit)  
 //         -a1Init - initial value of a1 parameter
 //         -fixA1 - logical value of a1 parameter, which allows to fix the parameter (not to fit)   
--- old/Root/tmva/src/ROCCalc.cxx	2015-10-02 16:27:51.000000000 +0200
+++ new/Root/tmva/src/ROCCalc.cxx	2015-10-21 13:26:39.292810145 +0200
@@ -284,7 +284,7 @@
 
 //_______________________________________________________________________________________
 Double_t TMVA::ROCCalc::GetEffSForEffBof(Double_t effBref, Double_t &effSerr){
-   // get the signal efficiency for a particular backgroud efficiency 
+   // get the signal efficiency for a particular background efficiency 
    // that will be the value of the efficiency retured (does not affect
    // the efficiency-vs-bkg plot which is done anyway.
   
--- old/Root/tmva/src/MethodBase.cxx	2015-10-02 16:27:51.000000000 +0200
+++ new/Root/tmva/src/MethodBase.cxx	2015-10-21 13:26:39.484812207 +0200
@@ -2122,7 +2122,7 @@
    // where PDF(x) is the PDF of the classifier's signal or background distribution
 
    if ((reftype == Types::kSignal && !fMVAPdfS) || (reftype == Types::kBackground && !fMVAPdfB)) {
-      Log() << kWARNING << "<GetRarity> Required MVA PDF for Signal or Backgroud does not exist: "
+      Log() << kWARNING << "<GetRarity> Required MVA PDF for Signal or Background does not exist: "
             << "select option \"CreateMVAPdfs\"" << Endl;
       return 0.0;
    }
