A main contribution has been his work to create a computer program, Logic 2000, on which students can do their assignments.

His main contribution, he said, is to keep others laughing.

Agricultural products are their main contribution to the world's markets.

But the main contribution at this hospital is, plain and simple, financial.

His main contribution has been to the understanding of the mind and social relationships.

His main contributions have come on special teams, where he has 13 tackles.

His main contribution to science was the theory of dominant.

Tonight his main contribution to the conversation came when fish was served as the first course.

The main contribution to the society is its direct economic support.

Many main contributions are still telling the story of their successful governance.