Text messaging is on your ohone while instant messaging is in your computer (AIM)

This refers to a computer science and html terminology of including files to electronic messaging transmittals. A body attachment can also be part of an document file such as a .docx.

rtf

It allows you to link different parts of a document to each other. You may have a piece of text that mentions a table and then have that piece of text link to that table in another part of the document. It is then cross referencing the items.

No.