type
       SizeType  { built-in type }
SizeType is an integer type (usually unsigned) to represent the size of objects in memory.
SizeType is a GNU Pascal extension.
     program SizeTypeDemo;
     var
       a: array [1 .. 10] of Integer;
       Size: SizeType;
     begin
       Size := SizeOf (a);
       WriteLn (Size)
     end.