In[]:=
Clear[a];
In[]:=
LaunchKernels[];
In[]:=
a={};b={};​​L1=Table[AppendTo[a,1],{i,1,10}];​​L2=ParallelTable[AppendTo[b,1],{i,1,10}];
In[]:=
a
Out[]=
{1,1,1,1,1,1,1,1,1,1}
In[]:=
b
Out[]=
{}