Pixar uses technology in the production of their films. Their most prominent use of technology is computers to run software which allows them to concept concept works, produce storyboards, and most significantly modelling and animating software to create the animation in their films which we all know and love. Pixar also relies on powerful, specially designed computers to use for the process of rendering.
That said, over the past two decades, computers have opened up unimaginable possibilities for animators. With sophisticated modeling software and powerful computer processors, the only limit is the animator's imagination.