according to vs an

according to

• In a manner conforming or corresponding to; in proportion to; in accordance with. , 

• Based on what is said or stated by; on the authority of. 

• Depending on. 

an

• In each; to or for each; per. 

• one 

• Used before one and words with initial u, eu. 

• Used before a vowel sound. 

• Used before all consonants. 

• Used before /h/ in an unstressed syllable. 

• Used before /h/ in a stressed syllable. 

• The first letter of the Georgian alphabet, ა (Mkhedruli), Ⴀ (Asomtavruli) or ⴀ (Nuskhuri).