Currently there are three.
There are currently 3 generations of the iPad, as of July 2012.
As of April 2013, the iPad 4 is the current 4th generation iPad.
it is not specified as there are now 4 generations but there is one side generation that is known as ipad mini ,so in conclusion it could be said that there are 4 but one side gen.
3 generations
5
The iPad 2 is a 2nd generation device. The current iPad (as of April 2013) is the 4th generation iPad 4.
The newest one is the iPad 2. This was released in March 2011. There have been hints that Apple will release the third generation iPad soon.
The newest type of Ipod is the new Ipod Shuffle which is a sleek short black color with voice playback which tells you the song and artist to make up for lack of screen lil wyte's answer- the newest ipod is the ipod touch
The iPad with Retina Display (4th Generation). Note that the 3rd Generation also does have retina display. It was call 'New iPad'. The latest model has a new A6X processor chip and a lightning connector, as well as dual-band WiFi.
Yes, the accessories for the first generation iPad Mini work on the second generation iPad Mini.
as of October 2013, yes
Only the New iPad (3rd Generation) and iPad with Retina Display (4th Generation).
IPAD
There was no product known as the iPad 3. The 3rd generation iPad was known as the 'new iPad'. The fourth generation iPad will also be known as the 'new iPad'.
The iPad mini and the iPad 4.
My Ipad
The 3rd generation of the ipad