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2. Engineering Industries Association. 1979. EIA Standard - EIA-274-D Interchangeable Variable Block Data Format for Positioning Contouring and Contouring~Positioning Numerically Controlled Machines. Washington D.C.: Engineering Industries Association. Engineering Industries Association. 1979. EIA Standard - EIA-274-D Interchangeable Variable Block Data Format for Positioning Contouring and Contouring~Positioning Numerically Controlled Machines. Washington D.C.: Engineering Industries Association.
3. Object-oriented application frameworks
4. On visual formalisms