Abstract
Self-organized and chaotic motions emerging in nonlinear development of instabilities in plasmas are reviewed. With a special focus on ion beam-plasma instability, an underdense plasma instability associated with stimulated Raman scatterring, collisional drift wave instability and Diocotron instability, notions of nonlinear entities such as solitons, vortices, and chaos are shown to be crucial to an understanding of the underlying physics at a saturated stage of instabilities.
