  The IceCube Observatory at the South Pole is composed of a cubic kilometer
scale neutrino telescope buried beneath the icecap and a square-kilometer
surface water Cherenkov tank detector array known as IceTop. The combination of
the surface array with the in-ice detector allows the dominantly
electromagnetic signal of air showers at the surface and their high-energy muon
signal in the ice to be measured in coincidence. This ratio is known to carry
information about the nuclear composition of the primary cosmic rays. This
paper reviews the recent results from cosmic-ray measurements performed with
IceTop/IceCube: energy spectrum, mass composition, anisotropy, search for PeV
gamma sources, detection of high energy muons to probe the initial stages of
the air shower development, and study of transient events using IceTop in
scaler mode.
