Alphabetic (adjective)

1. Arranged in the order of the letters of the alphabet.
2. Of, relating to, or using an alphabet.

Origin:

From late latin alphabeticus, from greek alphabētikos, from alphabētos, from alpha + bētos (beta), the first two letters of the greek alphabet.

Examples:

1. The index in the back of the book is in alphabetic order.
2. The phone book is arranged in alphabetic order by last name.
3. The program sorts the data in alphabetic order.
4. The alphabetic system is a way to represent sounds and words.
5. The alphabetic writing system is widely used all over the world.