what are some accomplishments of aristtole?

Answer 1

Aristotle, Plato's student, was a greek philosopher, but his work participated and improved fields like physics, biology, logic, ethics and politics.

Aristotle's and Plato's work had such a drastic impact over the ancient world, that their writings were the baseline of two of the most known schools of philosophy.

He is also known as the father of Biology, because he was the first to write about life, spirit, and noted the scientific aspects that differ humans from other life forms.

Answer 2

In what area? Aristotle was very prolific and made contributions to many areas. In science, his ideas held sway for hundreds of years. In logic, even longer. In psychology, much of what he called virtues are the building blocks of a new approach, positive psychology.
So again, what areas are you looking at?