What are the precautions that should be used while using ict tools while studying​

The forerunner to cell phones, pdas, and smartphones was

Janice usually works on a particular workbook that contains all business related data. she decides to keep a backup of all the data in a separate workbook. she opens a new workbook to transfer the data. which option should she use to copy all the data from one workbook to another workbook?

What are "open-loop" and "closed-loop" systems