41 Instruction on the use of computer aided design software; arranging and conducting of seminars in the fields of computer aided design and manufacture, graphics, image manipulation, construction measurement, construction cost estimation,cost management, site management, construction and project management, architectural and structure design, digital prototyping, and computer software usage; arranging and conducting of workshops featuring training in the fields of computer aided design and manufacture, graphics, image manipulation, construction measurement, construction cost estimation, cost management, site management, construction and project management, architectural and structure design, digital prototyping, and computer software usage; arranging and conducting of educational training congresses in the fields of computer aided design and manufacture, graphics, image manipulation, construction measurement, construction cost estimation, cost management, site management, construction and project management, architectural and structure design, digital prototyping, and computer software usage; production of radio and television programmes; providing on-line electronic publications, not downloadable, in the nature of newsletters in the fields of computer aided design and manufacture, graphics, image manipulation, construction measurement, construction cost estimation, cost management, site management, construction and project management, architectural and structure design, digital prototyping, and computer software usage; educational services, namely, classes and seminars in the field of structural engineering; publication of texts in the nature of books and journals, other than publicity texts; vocational retraining in the field of in the fields of computer aided design and manufacture, graphics, image manipulation, construction measurement, construction cost estimation, cost management, site management, construction and project management, architectural and structure design, digital prototyping, and computer software usage