<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 an operating system? Context: An operating system is a software that communicates with the hardware and allows other programs to run. Answer: [/INST]Software that communicates with the hardware and allows other programs to run.</s>