In the original idea a blog was a computer diary, which was openly accessable for other people and had important items marked with links to other websites. It was a first step towards the web 2.0 idea where others should be able to participate in one's own life. The visitors on the other hand could give a feedback to the author by leaving comments on articles they read.
The form of a blog has not changed much since but the contents now more and more provide all kind of personal opinions, news and information connected with a certain theme and is no more restricted to the contents of a diary.
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"They came to see and to be seen as well"
- Ovid
- Ovid