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"Dos" is a form of "dos", an adjective which is often translated as "two". "S" is a noun which is often translated as "s". Learn more about the difference between "dos" and "s" below.
dos(
dohs
)An adjective is a word that describes a noun (e.g., the big dog).
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
2. (number)
la s(
eh
-
seh
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
An abbreviation is the shortened form of a word or group of words (e.g., "UFO" = "unidentified flying object"; "p." = "page").