and terminology extraction It is a tool for automatic term extraction for identifying words typical of a particular corpus, document, or text. It supports extracting one-word and multi-word units from monolingual and bilingual texts. The terminology extraction feature provides a list of relevant terms based on comparison with a large corpus of general language. This tool is also a separate service operating as OneClick terms with a dedicated interface. List of text corpora Sketch Engine provides access to more than 700 text corpora. There are monolingual as well as multilingual language corpora of different sizes (from thousand of words up to 60 billions of words) and various sources (web, books, subtitles, legal documents, etc.). The list of corpora includes British National Corpus, Brown Corpus, Cambridge Academic English Corpus and Cambridge Learner Corpus, CHILDES corpora of child language, OpenSubtitles (a set of 60 parallel corpora), 24 multilingual corpora of EUR-Lex documents, TenTen Corpus Family (multi-billion web corpora), trends corpora (monitor corpora with daily updates), etc. Architecture Sketch Engine consists of three main components: an underlying database management system called Manatee, a web interface search front-end called Bonito and a web interface for corpus building and management called Corpus Architect. Manatee Manatee is a database management system specifically devised for effective indexing of large text corpora. It is based on the idea of inverted indexing (keeping an index of all positions of a given word in the text). It has been used to index text corpora comprising tens of billions of words. Searching corpora indexed by Manatee is performed by formulating queries in the Corpus Query Language (CQL). Manatee is written in C++ and offers an API for a number of other programming languages including Python, Java, Perl and Ruby. Recently, it was rewritten into Go for faster processing of corpus queries. Bonito Bonito is a web interface for Manatee providing access to corpus search. In the client–server model, Manatee is the server and Bonito plays the client part. It is written in Python. Corpus Architect Corpus Architect is a web interface providing corpus building and management features. It is also written in Python. Applications Sketch Engine has been used by major British or other publishing houses for producing dictionaries such as Macmillan English Dictionary, Dictionnaires Le Robert, Oxford University Press or Shogakukan and four of the UK's five biggest dictionary publishers use Sketch Engine. See also SkELL – a free web