This lesson introduces the basics of quantum information for single systems, including the description of quantum states as vectors with complex number entries, measurements that allow classical information to be extracted from quantum states, and operations on quantum states that are described by unitary matrices. Additional materials for this course, including written text, Qiskit implementations, slides in pdf format, and a badging exam, can be found on IBM Quantum Learning by following this link: https://learning.quantum.ibm.com/course/basics-of-quantum-information Timecodes for lesson sections: 0:00 - Introduction 2:06 - Lesson overview 4:01 - Descriptions of quantum information 5:52 - Classical information 10:52 - Dirac notation (first part) 15:23 - Measuring probabilistic states 18:50 - Deterministic operations 25:14 - Dirac notation (second part) 29:03 - Deterministic operations (continued) 30:55 - Probabilistic operations 34:50 - Composing operations 39:21 - Quantum information 47:43 - Dirac notation (third part) 50:48 - Measuring quantum states 55:57 - Unitary operations 59:21 - Qubit unitary operations 1:06:40 - Composing unitary operations 1:09:33 - Conclusion #ibmquantum #learnquantum #qiskit