The most popular system is run on smartphones and it is android.
<span>Ross viewpoint is most directly relevant to the issue of </span>continuity and stages.
Continuity because the development is a gradual and continuous process (<span>personality development is a matter of sudden qualitative changes) .
</span><span>Stages because the discontinuity theory says that development occurs in a series of distinct </span>stages. (v<span>arious turning points in the life span).</span>
