Quantum Computing, Fault Tolerance, Error Correction, Logical Qubits.
More than a few hundred qubits. Written as a regular expression, the combinations are {N,NP,FT}[SIL]SQ. Three times three is nine, so here are the nine combinations: NSSQ — Noisy Small-Scale Quantum devices. Most of today’s quantum computers. Under 50 or so qubits. NISQ — Noisy Intermediate-Scale