I can remember when I was growing up and my family acquired an encyclopedia. It represented a hefty cost, but gave us access to a source of knowledge. The breadth of information was breathtaking.
It is now possible to access a free encyclopedia at www.wikipedia.org. Wikipedia is a collaborative encyclopedia. That is to say, many people can add and/or edit the entries in it.
Wikipedia certainly has a lot of content. There a millions of articles available. However, the collaborative nature of Wikipedia is a two-edged sword. The content can be added to and edited very quickly. However, there is also the possibility that content that has be added is suspect as it is not independently reviewed for accuracy. Therefore, use Wikipedia but just be aware that it may not always be accurate.
