Document processing is a research area that focuses on the development of algorithms, techniques, and systems for processing, analyzing, and extracting information from various types of documents. This includes tasks such as document classification, information extraction, document summarization, and document clustering. Document processing often involves natural language processing, computer vision, machine learning, and information retrieval techniques to automatically process large volumes of documents efficiently and accurately. This research area is important for various applications such as information retrieval, text mining, content recommendation, and more.