SLR1.5 – Systems software 38. OCR GCSE (J277) 1.5 The purpose of operating systems 39. OCR GCSE (J277) 1.5 Operating systems 1 40. OCR GCSE (J277) 1.5 Operating systems 2 41. OCR GCSE (J277) 1.5 Utility system software Also in this topic... SLR1.1 – Systems architecture SLR1.2 – Memory and storage SLR2.1 – Algorithms SLR2.2 – Programming fundamentals SLR2.3 – Producing robust programs