the COBUILD project in the 1980s automate the dictionary-making process identify collocations MLDs were among the first dictionaries to appear on CD-ROM, with the Longman Interactive English Dictionary leading the way in 1993. More recently the six MLDs listed above have become available in free online versions. MLDs have been the subject of research into how people use dictionaries, as well as the subject of scholarly work. A standard book on the subject is Cowie 1999. Online dictionaries The Internet offers a range of online dictionary resources. Some, like the Open Dictionary of English, are explicitly designed as learner's dictionaries, and may even include built-in, adaptive tutoring. References External links Open Dictionary of English, ODE Cambridge Advanced Learner's Dictionary Collins COBUILD Advanced Dictionary Longman Dictionary of Contemporary English Macmillan English Dictionary Online Oxford Advanced Learner's Dictionary Merriam-Webster's Advanced Learner's English Dictionary Dictionaries by type Language acquisition