Cream together butter, sugar and brown sugar. Beat until fluffy.
Add eggs and vanilla. Mix well.
Add flour, oats, cinnamon, baking soda and salt alternately with pumpkin to the creamed mixture.
Mix in chocolate chips last, with a spoon.
Drop by teaspoonfuls onto cookie sheets.
Bake at 350 degrees for 10 minutes.
White chocolate chips or butterscotch chips may be substituted for the chocolate chips.