What does this mean on a camera lens?

Hi Can someone please break this down in laymens terms with examples for each whatever it's called. Thank you.

1 - I know AF is Automatic Focas - don't know the "S" and don't know everthing after that… Don't know "mm" and those numbers after it. Please can I have examples as well.thnak you so much

AF-S VR Zoom-NIKKOR 70-300mm f/4.5-5.6G IF-ED

A Nikkor AF-S is the latest version of the Nikon auto focus lenses. The lenses use an ultrasonic motor which is very quiet and vary fast focusing.

VR is a special vibration reduction scheme that allows a photographer to shoot at shutter speeds of up to four times slower can be done shooting with a standard lens without VR. This is especially helpful for those who have yet to master the art of holding a camera steady, especially when holding a long lens like the 70-300 mm

The 70-300 mm tells you the focal length of the lens and in this case it is a telephoto lens used when shooting field sports, action (like airshows or motocross) and some wildlife.

Here is a link to show you what those focal lengths (in millimeters -- mm) can "see"

http://imaging.nikon.com/...simulator/

The aperture of the lens at different focal lengths is described in f/stops or fractions of the focal length divided by the lens aperture. Example. A 50 mm lens with a maximum aperture of 25 mm is a lens with an f/2 f/stop. 50/25 = 2. The G indicates the design of the lens, the IF means that it focuses internally instead of the lens barrel moving causing the front element of the lens to rotate. It is important for two reasons, first because if you happen to have a polarizing filter on the lens, the filter will not move causing less polarizing effect as you change focus and second allows for faster focusing.

Finally the ED means that the camera has special lens elements in it that prevents ghosting or flare which can reduce the contrast of the image by the time it reaches the film or sensor. Canon calls their version of ED, "L" for luxury (don't ask why, it must be a translation issue from Japanese to English)