Several additional letters were received, raising questions about Kennedy's past, including his baseball record.

For example, additional letters may be added to indicate a strain.

But what if there could be additional genetic letters and words?

As a clue was presented, additional letters were placed into the headline.

There are additional letters that do not have regular shapes.

After six letters, each additional letter used in a word is worth 40 base points.

Some cartridge types have additional letters or information about them listed.

The additional letter represents a department, division or process within the organization/function addressed.

An additional 110,000 letters were mailed by groups that had endorsed him.

Israeli television said the agreement included two additional letters of understanding.