Document is a form of information that means record,or a capture of things and events so information will not be lost. But the process of to save, to improve and make essential is documentation. In IT especially we tend to use documentation as a plural for document.

What is document and documentation?

Document: a piece of written, printed, or electronic matter that provides information or evidence or that serves as an official record. ( Oxford Dictionaries Online) Documentation: Material that provides official information or evidence or that serves as a record.

What is considered documentation?

Documentation is any communicable material that is used to describe, explain or instruct regarding some attributes of an object, system or procedure, such as its parts, assembly, installation, maintenance and use. Documentation can be provided on paper, online, or on digital or analog media, such as audio tape or CDs.