In this paper we study a class Bk(�; b; c; m; ) which uni�es a number of classes studied previously by Mocanu and others. This class includes several known classes of analytic functions such as convex and starlike functions of order b, �-convex functions, functions with bounded boundary rotation, bounded radius rotation and bounded Mocanu variation. Several interesting properties like inclusion results, In- tegral representation, arclength problem, coe�cient bounds and distortion results of this class are discussed.