Many major employers routinely monitor the performance of their employees through the computers and telephones they use. Employers are allowed to

Employers are allowed to check the number of keystrokes that word processors enter during the day.

Explanation:

An employer is authorized to monitor the activity of its employee when:

The employee authorizes it. The employer owns the system to be used. Surveillance is necessary for a strictly professional purpose.

By analyzing the keys pressed per day, the employer can determine the performance provided by its employees, and if they use the company's resources, for non-work purposes.