PDF over plain text

We use PDF because not every machine on the company network has a full suite of MS office. Some machines have only outlook for email and snag a free copy of adobe reader to view pdf documents. PDFs also get used in situations where you want a semi uneditable document made and a majority of the time we just need the document to print out exactly one way. The majority of our PDF files are scans of documents in a master file and exported cad drawings which are usually to be printed by the recipients.