Two papers on "fag(sprog)lig Kommunikation"--languages for special purposes (LSP)--are presented. The first paper, in Danish, presents an alternative to the current structuralist oriented approach to the analysis of LSP as a kind of language in its own right and of texts written in this special kind of language. The approach is based on a more socio-pragmatic theory of communication. An attempt to illustrate the extreme complexity of the LSP communication context and the nature of factors and relationships involved in this type of communication situation are presented in a communication model. The second paper, in English, takes a closer look at one specific aspect of the communication model developed in the first paper, namely the problem of cognitive understanding. Communication strategies employed in a selection of Danish scientific texts are analyzed to illustrate some of the ways that cognitive understanding can be achieved. (VWL)