The Dictionary of the Scots Language comprises electronic editions of the two major historical dictionaries of the Scots language: the Dictionary of the Older Scottish Tongue (DOST) and the Scottish National Dictionary (SND). DOST contains information about Scots words in use from the twelfth to the end of the seventeenth centuries (Older Scots); and SND contains information about Scots words in use from the eighteenth century to the present day (modern Scots). These are the most comprehensive dictionaries available for, respectively, Older Scots and modern Scots, and are therefore essential research tools for anyone interested in the history of either Scots or English language, and for historical or literary scholars whose sources are written in Scots or may contain Scots usages