The question of the division of the sciences has a long history.
Aristotle, Boethius (d. ca. 525 A.D.), et al. divided philosophy as follows (cf. St. Thomas Aquinas's Division & Methods of the Sciences):
PHILOSOPHY
Speculative Sciences
Natural Sciences
Mathematics
Metaphysics
Practical Sciences
Art
Prudence
Christian von Wolff (1679-1754), whom Kant called "the greatest of all dogmatic philosophers," identified metaphysics with philosophy itself, placing it first in his division of the sciences:
PHILOSOPHY (Metaphysics)
General Metaphysics (Ontology)
Special Metaphysics
Metaphysics of Bodies
Metaphysics of Spirits
of Created Spirits
of Uncreated Spirits