Information Systems
Secondary
Primary
Directly from a source, such as an equipment manufacture or actual audience
Examples:
Interviews
Video footage
Diaries
First-hand accounts
Photos
Original works
Relics
Autobiographies
Official records
Obtaining information 'first hand' which is an original source and is therefore reliable.
Obtained second hand or where somebody else has already put their own interpretation on the original information.
Examples
Magazine articles
Encyclopaedias
History textbooks
Reports
Second-hand accounts
Other people's products
Commentries
News broadcasts
Biographies
Indirectly sourced such as forums, reviews opinions from users.