TDSS

installation and maintenance services in connection with computers, computer software, computer systems, communication systems, and management information systems in the fields of manufacturing, telephone systems, communications, banking, insurance, investment, railroads, airlines, oil and gas exploration, refining, printing, newspapers, hotels, footwear, school supplies, defense, atomic energy, education, transportation agencies, motor vehicle regulation, aerospace, real estate, police, courts, government administration, employment security, social welfare, labor, tobacco, cosmetics, public opinion polls, TV broadcasting, credit cards, and food services

education, instruction and training services in connection with computers, computer software, computer programming, computer systems, communication systems, and management information systems in the fields of manufacturing, telephone systems, communications, banking, insurance, investment, railroads, airlines, oil and gas exploration, refining, printing, newspapers, hotel, footwear, school supplies, defense, atomic energy, education, transportation agencies, motor vehicle regulation, aerospace, real estate, police, courts, government administration, employment security, social welfare, labor, tobacco, cosmetics, public opinion polls, TV broadcasting, credit cards, and food services

computer programming services for others, computer software development and design and design services for others, and consulting services in connection with computers, computer software, computer systems, communication systems, management information systems and computer assisted training and education in the fields of manufacturing, telephone systems, communications, banking, insurance, investment, railroads, airlines, oil and gas exploration, refining, printing, newspapers, hotel, footwear, school supplies, defense, atomic energy, education, transportation agencies, motor vehicle regulation, aerospace, real estate, police, courts, government administration, employment security, social welfare, labor, tobacco, cosmetics, public opinion polls, TV broadcasting, credit cards, and food services