Answer: All of the above
Explanation: External entity is the thing that belongs to the outside surface or environment.In relation with the organizational field , external entity is the any outside source that is not a part of the organization.A person can be external entity if he/she is not a part of organization or employee.
Another department can be external entity with respect to a particular department of the same organization ,E.g.- Finance department can be external entity for the human resource department and vice-versa.
Computer system belonging to a person can be external entity for the other employee even being in same or different department of the organization E.g.- Employee 1 has computer system and it is a external source for the employee 2 because it does not belong to him and is outside of the his surrounding .
Thus, all the options are correct.
