This document discusses CPU scheduling and process scheduling. It covers different types of scheduling algorithms used for batch systems, interactive systems, and real-time systems. For batch systems, it describes FCFS, shortest job first, and shortest remaining time algorithms. For interactive systems, it discusses round robin, priority, shortest process next, and lottery scheduling. Real-time systems require meeting deadlines for periodic and aperiodic events. It also covers user-level and kernel-level thread scheduling and examples of scheduling for dining philosophers.