Description: In the article the analysis of the current state of GRID-technologies, the advantages and disadvantages of application middleware. The main function of the middleware is to provide a user-friendly interface between the application and computing resources. Considered by the evolution of the job description languages, noted the lack of GRID-systems standard job description. This leads to a number of problems and errors when trying to start them up.
Keywords: Middleware, GRID-polygons, distributed environments, job description languages