<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  What is the main purpose of an operating system? Context: The main purpose of an operating system is to manage hardware and software resources of a computer. Answer: [/INST]To manage hardware and software resources of a computer.</s>