what are pdf, doc, docx, txt, rtf, odt
DOCX is an MS Office text format of new generation (starting from 2007 versions). It is a more open, more standardized version that allows various apps get easier access to data stored in Word files. DOCX files are lighter in size than DOC analogues due to a new, XML-based file structure.
pdf Portable Document Format. PDF is a document file format that contains text, images, data etc. This document type is Operating System independent. It is an open standard that compresses a document and vector graphics. It can be viewed in web browsers if the PDF plug-in is installed on the browser.
TXT format is the simplest text file standard that doesnât support formatting. Such file contains text characters, tab and line feed characters. Being outdated in functionality it has one major advantage - compact file size, comfortable for sharing, data export/import.