GREY TYPE A: This is the type most commonly referred to as the greys. Also known as Zeta Reticuli from the Zeta Reticulan star system (the Bernard star) neighboring the Orion area. They function in a mode that is apparently military in nature with a rigidly defined social structure that holds science and "conquering worlds" to be the prime movers. They are normally about 4.5 ft tall with large heads and black "wrap around" eyes. They have limited facial features, slit mouth and no nose to speak of. They have evolved beyond the need for reproductive systems or digestive systems and reproduce by cloning. Their genetics are partly based on insectoidal genetics. Their science deals largely with the study of other life forms and genetic engineering. They have supposedly had a part to play in the alteration of human genetics over thousands of years. It seems that they may be trying to cross breed with humans in order to create a "mixture race" that would be better than either. (I've read that they are a dying species, that have cloned so much that now, with each successive cloning, the species grows weaker. They are trying to infuse new life into their species by creating the mixed breed.) There seem to be two main social classes. One is the more hawkish and is more abrupt, crude and blunt. The more dove-like ones are more refined and capable of a more business-like behavior towards humans, and prefer to use more "diplomatic" behavior to gain control over human's. This type of Grey is what I believe is being referred to as the "Orange" class of Greys. They seem to be emotionless (by human standards) and therefore are seen as cruel in their treatment of human beings. They are able to take human lives without any regard for that individual. They apparently can use certain substances of the human body for their sustenance and therefore appear to be carnivorous in regards to humans. (I also read that they extract fluid from some part of the human brain during intense emotional response [fear] and are able to use it like a recreational drug.) It is my understanding that these greys are actually servants to a master race of reptilian-type aliens and are trying to prepare the earth for their arrival by gaining control over the earth through many means. They tend to enjoy the feeling of freedom they have on earth, away from their masters and would desire the help of humans in confrontations with the reptilians...which appears to be a consideration for the near future (mid 90's.) These greys have their best known bases in New Mexico and Nevada but are also known to have bases in many countries of the world.
GREY TYPE B: Tall Greys from Orion. Usually about 7 to 8 ft. tall (reports often exaggerate their height as being 9 to 12 ft.) with facial feature somewhat similar to grey type A with the exception of the large nose found on type B greys. These greys also have technologies that allow them to perform certain actions that appear "miraculous." These greys are less viscous towards humans than type A greys (but are still considered "hostile".) They tend to influence more through political controls and negotiated agreements with those in power. Their main bases seem to be in the Aleutian Islands. These are the type seen not long ago in Eastern Russia.
GREY TYPE C: These are the shortest of the greys and tend to be about 3.5 ft. tall. Their facial features are very similar to the Zeta Reticuli greys and are of the same "root race.". They are just as hostile to humans as the Zetas. They are from a star system near the shoulder of Orion called Bellatrax.
ALIEN TYPE 2: THE REPTILIANS: A genetics akin to reptiles, these are highly advanced entities but viewed as being of a negative, hostile or dangerous disposition since they regard humans as a totally inferior race. They would perceive us much the way we would perceive a herd of cattle. They are carnivorous in regard to humans. There is supposedly a "driven" planetoid or asteroid inhabited by 30 million of these lizard-folk that is to enter our solar system in the mid 90's if the present schedule is kept. They consider earth to be their own ancient outpost and would expect to have complete control of the entire planet upon their return. Their own planet is becoming unable to adequately support life and they need somewhere else to live. These are the aliens who are served by the type A greys.
ALIEN TYPE 3: HUMAN TYPE ALIENS HUMAN TYPE A: These are of a genetic base similar to humans of earth. They appear of "normal" height (5-6ft?) and tend to be fair-skinned with blonde hair. These entities have been abducted by the greys or are the offspring of abductees and have been trained by the greys as servants. These entities are totally subservient to the greys.
HUMAN TYPE B: These are aliens of similar genetics to earth humans and also, it seems, of the humans that serve the greys. These are from the Pleiades and are also of the blonde, fair-skinned appearance. This type is of a genuine highly evolved, spiritual, benevolent variety and have a kinship toward humans and are the only aliens to be truly trusted by earth humans at this time. They had at one time offered to be of assistance to earth leaders in dealing with the alien situation here but were rebuffed and so have taken a kind of "hands off" approach for the time being. These aliens are supposedly the forefather race of humankind. These are apparently not on earth much at this time due to serious problems in the area of their home.
HUMAN TYPE C: Very little is known about these. They are supposedly another of the highly evolved, spiritual type of great benevolence to earth humans. I understand that their appearance is similar to other human-type aliens. They are from Sirius and don't appear to be much involved with earth happenings at this time other than being concerned about the Grey scenario. They could desire to be of help to humans. There are other known human type aliens of this "more highly spiritually evolved" nature that are apparently aware of the situation on earth and considering some possible course of action. These are from Arcturus and Vega.
(this is an article which can be found at http://www.scribd.com/doc/5012547/Extraterrestrials-Aliens )