what's A mean? What's this technology's name?

what's A<int(int)> mean? What's this technology's name?

References

Reference NO 1

http://stackoverflow.com/questions/15199400/whats-aintint-mean-whats-this-technologys-name

Reference NO 2

http://en.wikipedia.org/wiki/XML

Reference NO 3

http://wiki.answers.com/Q/What_does_the_domain_.int_mean

Reference NO 4

http://en.wikibooks.org/wiki/Java_Programming/Print_version

Reference NO 5

http://electronics.howstuffworks.com/question659.htm

Reference NO 6

http://350.org/

Reference NO 7

http://www.intel.com/content/www/us/en/processors/processor-numbers.html

Reference NO 8

http://photo.stackexchange.com/questions/24109/what-does-stm-mean-on-a-canon-lens