Electro-Optical-System. I Googled it because I didn't know. There is a full article in Wikipedia on the subject if you wish to know more.
My suggestion to all is that the answers (and much more) to many such questions are that easy to discover if you would endeavor to search.
Canon eos rebel t3 slr is a better camera compared to canon eos rebel t2i
EOS is Electro-Optical System. It controls the optics of a lens through electronic system.
Yes
Canon EOS 500N is a 35mm film camera released in 1996.
There are plenty of places that has the canon eos online. One place that has this camera available is at http://www.pricegrabber.com/canon+eos+d2000/products.html
The Canon EOS Rebel XS camera is compatible with rechargeable lithium-ion batteries.
Yes, with a FD to EOS mount adapter.
canon EOS 70D
Canon
a Canon EOS 500D or 450D ...! ^_^v
The Canon EOS 450d is a fairly new camera that has improved features from the other Canon cameras, and gets good reviews. The Canon EOS 450d has 12.2 megapixels and high resolution.
One can find a consumers report on a Canon camera on the 'Consumer Reports' website. They have a number of reports on Canon models including the EOS 7D and EOS Rebel T3i.