A knowledge base is a place where knowledge of a company, a department or a team can be collected centrally. This is where employees gather their team and department knowledge and companies use it to provide an online helpdesk to answer frequently asked questions (FAQs) and share best practices.
Last but not least, you'll find information about products, services, events, organizations, locations and partnerships.
Wikis as Knowledge Base
Wikipedia and its sister projects are certainly the most popular knowledge bases. Wikis are created to easily and collaboratively dynamically supplement or update knowledge. Different contributions are quickly linked to each other. As time goes by, wikis become more and more valuable as the connections become richer and more complex.
Wikis and especially the wikipedia software MediaWiki is designed in such a way that knowledge can be merged and individual wikis can be combined.