A half an hour summary of the Computer Systems theory exam in OCR J277 GCSE Computer Science which will hopefully be useful for that last minute revision. If you have this exam very soon, then best of luck! To learn the content in the first place, or to revise more thoroughly (as you 100% should if you have more time), please do see my full playlist of more detailed videos that are specific to this particular exam:    • (Paper 1, J277) OCR GCSE Computer Sci...   Timestamps: 0:00 Introduction 0:22 1.1 Systems Architecture 4:32 1.2 Memory and Storage 13:29 1.3 Computer Networks, Connections, and Protocols 19:29 1.4 Network Security 23:30 1.5 Systems Software 26:31 1.6 Impacts