After Kevin asks his Dad about what he does at work, Mr. Arnold brings his son to work at NORCOM and shows him around.
After Kevin wants to know what his father does at work, Jack brings Kevin with him to NORCOM (Jack's employer), and Kevin learns more by spending the day in his father's office. After witnessing severe disciplinary action from Jack's boss over the incompetence of Jack's subordinates, Kevin realizes why his father returns home from work in a nasty mood most of the time..