  I review of the observational properties of Soft Gamma Repeaters (SGRs) and
Anomalous X-ray Pulsars (AXPs), two unusual manifestations of neutron stars. I
summarize the reasoning for SGRs being "magnetars," neutron stars powered by
the decay of a very large magnetic field, and the now compelling evidence that
SGRs and AXPs are in fact members of the same source class, as predicted
uniquely by the magnetar model. I discuss some open issues in the magnetar
model, and the prospects for future work.
