Presentation covers fundamental of CPU architecture and memory model used for Parallel Processing in easy to understand language. Apart from theory, small example C code has also been provided. Topics covered are 1. Introduction 2. Michael Flynn Classification (SISD, SIMD, MISD, MIMD) 3. Memory Model ( Shared vs Distributed) 4. SIMD 5. MIMD on Shared Memory 6. MIMD on Distributed Memory