Relating to things in groups

When relating to things in groups of two or more the second of the two or the last of several is referred to as the latter.

Example: If deciding between apples and oranges you should consider that the latter is currently in season.

When relating to the first in order of two or more things we use the term former.

Example: Color and colour are two common ways of spelling the same word. Of the two given, the former spelling is more common in American English.