  Young supernova remnants that contain pulsar wind nebulae provide diagnostics
for both the inner part of the supernova and the interaction with the
surrounding medium, providing an opportunity to relate these objects to
supernova types. Among observed young nebulae, there is evidence for a range of
supernova types, including Type IIP (Crab Nebula and SN 1054) and Type
IIb/IIn/IIL (G292.0+1.8).
