Webster's Revised Unabridged Dictionary · 1913

According

According , past participle (adjectival)

Agreeing; in agreement or harmony; harmonious.
This according voice of national wisdom. — Burke
Mind and soul according well. — Tennyson
According to him, every person was to be bought. — Macaulay
Our zeal should be according to knowledge. — Sprat
Is all things well, According as I gave directions? — Shakespeare
The land which the Lord will give you according as he hath promised. — Ex. xii. 25

According to has been called a prepositional phrase, but strictly speaking, according is a participle in the sense of agreeing, acceding, and to alone is the preposition.

Collocations (1)
According as , precisely as; the same as; corresponding to the way in which. According as is an adverbial phrase, of which the propriety has been doubted; but good usage sanctions it. See According, adv.

According ({not transcribed}) , adverb

Accordingly; correspondingly. [Obsolete] — Shakespeare