It is a table of possessive pronouns in Nominative case.
? - whose
I - my
you(single) - your
he/it - his/its
she - her
you(plural) - your
Second, fourth and sixth columns represent possessives in masculine, feminine and neuter correspondingly.
Posessive pronouns in Russian change according to the gender of the word they relate to. It means that in Russian in phrases "my man" and "my woman" word "my" will be different: it will take masculine gender in the first case (мой) and feminine gender in the second case (моя).