Do dams need to be maintained after they are built?

Which of the following is a way the operating system prevents unknown or unauthorized users from accessing the system?

What are the steps involved in accepting all the changes in a document? arrange these in order click edit. click accept or reject. click changes. click accept all.

Michael has written an e-mail to his employees that describes a new product special that will be introduced to the customers next week. by taking time to make sure the e-mail is well written, logical, and organized, michael has made sure his message has the characteristics of a) effective communicationb) ineffective communicationc) barriers to communicationd) workplace communication