The stopword lists based on the SMART (System for the Mechanical Analysis and Retrieval of Text) Information Retrieval System, an information retrieval system developed at Cornell University in the 1960s.
An object of class list of length 1.
stopwords(language = "en", source = "smart")
Lewis, David D., et al. (2004) "Rcv1: A new benchmark collection for text categorization research." Journal of machine learning research 5: 361-397.