Names, ID, crossing, etc...

[Lil Bit]

I'm looking at purchasing orchids online and sure could use a little help with understanding the way that plants are identified. I'm not looking for the long version, if that's possible, but sure would appreciate a quick lesson in understanding this whole new language.

For instance, I understand that PID: OC81 refers to the plant identification number. Does OC relate to Oncidium, since this particular plant is an Oncidium? Or do I have that all wrong?

I'm only using this as an example but what about this: "ODM Maureen X Haematochilum X Noorah X ODM Josephine". I'm assuming the "X" denotes that it's been crossed with a certain plant. Close???

What about the "ODM"?

I'm sorry to take up space here with a question that may have been answered many times over, but I have not been successful in my search for answers.

TIA, to anyone and everyone who might help me understand this confusing matter better.

Rita