Answer:
Camera or Webcam
Explanation:
Based on the information provided within the question it can be said that in order for all the employees of the company to be able to use face recognition software they would either need a Camera or Webcam. This will scan their face and run the image through a facial recognition database and if it finds a match in their authorized logins it will allow that worker to log on to the computer securely without the need for a user name or password.
