<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 purpose of a barcode scanner? Context: A barcode scanner is used for reading information from barcodes to identify products. Answer: [/INST]A barcode scanner is used to read information from barcodes to identify products.</s>