While it might have grown over time and helped us communicate, it also isn't always 100% reliable. And, technology isn't always seen as the safest either, there is no guarantee your information will be safe and secure with technology.
The elements of all business letters are the following: the heading, the date, the inside address, the salutation, the body, the signature, and the complimentary close. Therefore, the one that is not part of the elements of all business letters is the references.
Diction
I think diction has to do the most with the subject of word choice
If you are in a fire you shall go to your meeting place,if you have one.If you are on fire you shall stop drop and roll!!Hope this helps