In this Subject, I will share my class notes of Process management that includes (Process State Diagrams, Process Scheduling Algorithm (Numerical), Process Synchronisation, Process Deadlock and Deadlock handling techniques, Memory Management that includes( Main Memory Management and Virtual Memory Management with Numerical) and Disk Scheduling Algorithm with Numerical. I have included lots of Gate Questions which may helpful for the students for competitive examination like GATE, DRDO, ISRO and GPSC.