Discuss the differences between Information Retrieval and Web Search.Can you identify two language modeling toolkits?

Information Retrieval (IR) and Web Search are closely related fields in computer science that deal with finding and retrieving relevant information from large collections of data. While they share similarities, they also have distinct characteristics:

Scope:
Information Retrieval: Information retrieval focuses on retrieving relevant information from various sources, including text documents, databases, and multimedia content. It is a broader field that encompasses different types of data and retrieval techniques.
Web Search: Web search specifically focuses on retrieving information from the World Wide Web. It deals with indexing and searching web pages, documents, images, videos, and other online content.
Data Sources:
Information Retrieval: In information retrieval, data sources can include structured databases, digital libraries, academic repositories, and other types of organized data collections.
Web Search: Web search primarily deals with unstructured data sources found on the web, such as web pages, blogs, forums, social media platforms, and online multimedia content.