diff --git a/SimPEG/Data.py b/SimPEG/Data.py
index fa37b09a..7a793065 100644
--- a/SimPEG/Data.py
+++ b/SimPEG/Data.py
@@ -56,12 +56,12 @@ class BaseData(object):
 
             Where P is a projection of the fields onto the data space.
         """
-        if u is None: u = self.prob.field(m)
-        return Utils.mkvc(self.projectField(u))
+        if u is None: u = self.prob.fields(m)
+        return Utils.mkvc(self.projectFields(u))
 
 
     @Utils.count
-    def projectField(self, u):
+    def projectFields(self, u):
         """
             This function projects the fields onto the data space.
 
diff --git a/SimPEG/Examples/DC.py b/SimPEG/Examples/DC.py
index 074f5e3d..ee8a427f 100644
--- a/SimPEG/Examples/DC.py
+++ b/SimPEG/Examples/DC.py
@@ -69,7 +69,7 @@ class DCProblem(Problem.BaseProblem):
         A = D*Msig*G
         return A.tocsc()
 
-    def field(self, m):
+    def fields(self, m):
         A = self.createMatrix(m)
         solve = Solver(A)
         phi = solve.solve(self.data.RHS)
@@ -98,7 +98,7 @@ class DCProblem(Problem.BaseProblem):
                 J(v) = - P ( A(m)^{-1} ( G\\text{sdiag}(Du)\\nabla_m(M(mT(m))) v ) )
         """
         if u is None:
-            u = self.field(m)
+            u = self.fields(m)
 
         u = self.data.reshapeFields(u)
 
@@ -123,7 +123,7 @@ class DCProblem(Problem.BaseProblem):
         """Takes data, turns it into a model..ish"""
 
         if u is None:
-            u = self.field(m)
+            u = self.fields(m)
 
         u = self.data.reshapeFields(u)
         v = self.data.reshapeFields(v)
@@ -214,7 +214,7 @@ if __name__ == '__main__':
     # Create some data
     data = prob.createSyntheticData(mSynth, std=0.05, P=P, RHS=q)
 
-    u = prob.field(mSynth)
+    u = prob.fields(mSynth)
     u = data.reshapeFields(u)
     M.plotImage(u[:,10])
     plt.show()
diff --git a/SimPEG/Examples/Linear.py b/SimPEG/Examples/Linear.py
index a83b26f1..e18750c1 100644
--- a/SimPEG/Examples/Linear.py
+++ b/SimPEG/Examples/Linear.py
@@ -9,7 +9,7 @@ class LinearProblem(Problem.BaseProblem):
         Problem.BaseProblem.__init__(self, mesh, model, **kwargs)
         self.G = G
 
-    def field(self, m, u=None):
+    def fields(self, m, u=None):
         return self.G.dot(m)
 
     def J(self, m, v, u=None):
diff --git a/SimPEG/ObjFunction.py b/SimPEG/ObjFunction.py
index ea2fe831..91722b68 100644
--- a/SimPEG/ObjFunction.py
+++ b/SimPEG/ObjFunction.py
@@ -73,7 +73,7 @@ class BaseObjFunction(object):
         self.u_current = None
         self.m_current = m
 
-        u = self.data.prob.field(m)
+        u = self.data.prob.fields(m)
         self.u_current = u
 
         phi_d = self.dataObj(m, u=u)
@@ -160,7 +160,7 @@ class BaseObjFunction(object):
                 \\frac{\partial \mu_\\text{data}}{\partial \mathbf{m}} = \mathbf{J}^\\top \mathbf{W \circ R}
 
         """
-        if u is None: u = self.data.prob.field(m)
+        if u is None: u = self.data.prob.fields(m)
 
         R = self.data.residualWeighted(m, u=u)
 
@@ -204,7 +204,7 @@ class BaseObjFunction(object):
                 \\frac{\partial^2 \mu_\\text{data}}{\partial^2 \mathbf{m}} = \mathbf{J}^\\top \mathbf{W \circ W J}
 
         """
-        if u is None: u = self.data.prob.field(m)
+        if u is None: u = self.data.prob.fields(m)
 
         R = self.data.residualWeighted(m, u=u)
 
diff --git a/SimPEG/Parameters.py b/SimPEG/Parameters.py
index 2a07aa69..9b12d8d1 100644
--- a/SimPEG/Parameters.py
+++ b/SimPEG/Parameters.py
@@ -137,7 +137,7 @@ class BetaEstimate(Parameter):
         u = objFunc.u_current
 
         if u is None:
-            u = data.prob.field(m)
+            u = data.prob.fields(m)
 
         x0 = np.random.rand(*m.shape)
         t = x0.dot(objFunc.dataObj2Deriv(m,x0,u=u))
diff --git a/SimPEG/Problem.py b/SimPEG/Problem.py
index 386fac9d..df37d05a 100644
--- a/SimPEG/Problem.py
+++ b/SimPEG/Problem.py
@@ -142,7 +142,7 @@ class BaseProblem(object):
         """
         return self.Jt(m, v, u)
 
-    def field(self, m):
+    def fields(self, m):
         """
             The field given the model.