Zine - Classification?

Initially, when thinking of a Zine, I always used to think of a pamphlet of sorts, that would advertise a club or upcoming gigs. 

Then again, what is the difference between a pamphlet and a zine?  

Classification: 

• Zine - "...A small collection of original works and/or texts often reproduced by photocopy..." 
• Fanzine - "...a non-official and and non-professional publication which is reproduced, and made to support a cultural phenomenon..." 
• Magazine - "...A publication normally done on ink and paper to a high standard of quality, reproduced on mass, and normally fairly lengthy compared to that of a regular zine..." 
• Perzine - "...A personal zine, a publication that represents the personal opinions and/or works of the creator, commonly utilized in the revived zine movement today..." 

These seem to be the most popular of the current "zines" in the "movement" today. 

Zines may have lost some of their purpose as an everyday item, due to such inventions as the internet, however the revived underground movement has begun to bring a whole new light onto the publication itself.