The paper gives overview of MPEG-2 system sub part. The system part covers method of combining one or more audio, video or data streams into one or more system streams, audio-visual synchronization and buffer management. The paper does not cover system standard in depth. The paper is intended for the novice to unravel the MPEG-2 system standard, introduce the MPEG-2 system, and help the designer of MPEG-2 systems to build a system without getting lost in the intricacies of the MPEG system part. The paper also covers DSM-CC part 6 of MPEG-2 standard, Splicing and jitter in short.