Theoretical lectures: Basic definitions and concepts; difference between a General Purpose Language (GPL) and Domain Specific Language (DSL). External and internal DSLs. DSL as a set of coordinated models. History and development of DSLs; Traditional and modern notions of DSLs; Impact of DSL usage on productivity. Language Workbenches. Examples of DSLs. Domain analisys. Communication with domain experts; Techniques of recognition of key concepts from the domain description. Techniques of detecting the concepts relations. Abstract syntaxes, abstract syntax definition techniques, meta-modeling. Languages ??for meta-models definition (MOF, ECore, GOPPRR, MoRP). Concrete syntaxes, concrete syntax definition, concrete syntaxes as the interfaces with the user, textual concrete syntaxes (EBNF, Xtext, Emfatic); graphical concrete syntaxes (GMF, Graphite, Spray, Eugenio); automated layouting; Language expressions definition using wizards; Tree-based syntaxes; table-based syntaxes; hybrid syntaxes, cultural and social aspects of creating highly usable and readable concrete syntax; framework of cognitive dimensions and impact of human cognitive abilities on the readability of language expressions. Secondary notation and its impact on the language expression comprehension. The semantics of the language; semantic constraints definition; semantic rules check. Interpreters; dynamic analysis and interpretation of language expression; optimization techniques. Translators - code generators; language expression analysis techniques and code generation for arbitrary target platform; Template engines. Coevolution of language; Horizontal and vertical coevolution; change propagation from higher to lower meta-level, propagation of changes within the same meta-level between the dependent statement. Practical classes: design and creation of DSL for a given domain. The division into project teams. Domain analysis. Extracting key concepts and their relationships. Creating language abstract sy