Methods of preparation and properties of composites of micro and nanopartic
les with polymers are reviewed. Attention is paid particularly to electrica
l, optical and related properties. Some nanostructured systems are discusse
d in more detail. The short discussion of nanointercalates is presented to
show the correlations between these two types of nanosystems. The discussio
n is closed with author's personal view on some aspects of nanoscience in t
erms of nanocomposites.