The paper is devoted to the analysis of state of the art in visual parallel programming languages. The brief history of this domain is described. The diagrammatic imagery of visual languages is analyzed. Limitations of the diagrammatic approach are revealed. The additional type of visual parallel programming languages (action language) is described. Some problems of perception of visualization for parallel computing are considered. Some approaches to the evaluation of visual programming languages are suggested.Ключевые слова: Visual parallel programming languages; diagrammatic languages; perception of visualization.