  Low-frequency radio phenomena are due to the presence of nonthermal electrons
in the interplanetary (IP) medium. Understanding these phenomena is important
in characterizing the space environment near Earth and other destinations in
the solar system. Substantial progress has been made in the past two decades,
because of the continuous and uniform data sets available from space-based
radio and white-light instrumentation. This paper highlights some recent
results obtained on IP radio phenomena. In particular, the source of type IV
radio bursts, the behavior of type III storms, shock propagation in the IP
medium, and the solar-cycle variation of type II radio bursts are considered.
All these phenomena are closely related to solar eruptions and active region
evolution. The results presented were obtained by combining data from the Wind
and SOHO missions.
