Disciplines that contribute to the technical approach to information systems include: management science, computer science, and engineering. operations research, management science, and computer science. economics, sociology, and psychology. engineering. utilization management, and computer science. computer science, engineering, and networking. Approximately how much revenue was generated by e-commerce in 2017? About $700 billion About $180 billion About $1 trillion About \$2 trillion About $229 billion