send documents using computers "or" send documents by using computers
which (1) or (2) is correct?
having "by" or not having "by"
(1)another important aspect of this is that people are able to type all their information,make corrections,print or send documents using computers.
(2)
(1)another important aspect of this is that people are able to type all their information,make corrections,print or send documents by using computers