  We give a review of the black-hole/qubit correspondence that incorporates not
only the earlier results on black hole entropy and entanglement measures, seven
qubits and the Fano plane, wrapped branes as qubits and the attractor mechanism
as a distillation procedure, but also newer material including error-correcting
codes, Mermin squares, Freudenthal triples and 4-qubit entanglement
classification.
