Information Seeking and Retrieval
All digital libraries are searchable, whether through direct query entry or through some form of browsing, or both. LC's American Memory project, which is one of the more well-developed and complex digital libraries, offers direct search through the entire collection, or through selected collections, with the same kinds of options (match any words, all words, this exact phrase) as Internet search engines. Users may also browse through collections, and within a collection can browse subject and author indexes.