Nikon lens hood acronyms

Here is what they mean folks:

Code Type Notes
HB Bayonet hood The most common one today. Usually has a flower-petal design.
HE Extension for already existing hood on long lenses Not very common
HK Slips on the lens, locks with a knob. Older lenses seems to have this sometimes for long telephoto lenses
HN Screw mount hood Never seen this one myself.
HR Rubber hood Great for prime lenses especially if you need to shoot through a glass pane. Keeps the reflexes out so the glass is hardly not visible.
HS Snaps on Like a lens cap. Never seen this one myself.