In this lecture from the Yale Quantum Institute Course on Quantum Error Correction, held at Yale University in July 2025 in partnership with North Carolina A&T, Takahiro Tsunoda discusses hardware efficient qubit encodings, focusing on cat qubits and dual rail qubits. The lecture examines how choosing the right physical encoding can suppress certain error types by design, reducing the overhead needed for full error correction. It builds on the course's earlier treatment of bosonic modes and noise models, applying that theory to specific encoding strategies used in current superconducting quantum computing research.