Clinical natural language processing (NLP) is a research area that focuses on developing tools and techniques to extract and analyze information from clinical text data, such as electronic health records, doctor notes, and medical literature. This field combines principles from computer science, linguistics, and healthcare to improve information retrieval, clinical decision-making, and patient care. Clinical NLP applications include disease prediction, patient diagnosis, treatment recommendation, and biomedical research. Researchers in this area work on developing advanced algorithms and models to process and understand unstructured clinical text data for better healthcare outcomes.