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Which of the following is NOT something users do on social networking sites?

A) Social networks are all about hanging out virtually. B) Users spend time posting their own thoughts and activities to their friends and followers. C) Users separate short text messages or status updates into a separate feed. D) Typical users spend much of their time online cruising through the news feeds and profiles, finding out what people they know are doing.

Pick the most important HCI goals as they apply to each of the following types of applications. Justify your answer.

a. Air traffic control b. Ticket booking software for travel agents c. Reservation software for airline agents at the luggage check-in counter d. Flight simulators to train airline pilots e. An adaptation of a flight simulator as a video game for home use