Quantum Computing, Fault Tolerance, Error Correction, Logical Qubits.
https://en.wikipedia.org/wiki/Quantum_error_correction 5 “A generalisation of the technique used by Steane, to develop the 7-qubit code from the classical [7, 4] Hamming code, led to the construction of an important class of codes called the CSS codes, named for their inventors: A. R. Calderbank,