LotusScript is a programming language used to automate and extend the capabilities of Lotus Notes, now known as HCL Notes. It was primarily used in the development of database-driven applications within the Lotus Domino environment. The syntax of LotusScript is similar to Visual Basic and allows developers to manipulate objects on the server or client side through COM (Component Object Model), OLE (Object Linking and Embedding), or DOM (Document Object Model). This language provides support for structured programming, handles exceptions using Try-Catch error handling blocks, offers multi-threading functions with its agents, and supports many data types, including strings, integers, and variants.