That ‘Oregano’ probably belongs to the wrong decade, if not the wrong century. A thread on comp.unix.wizards suggests that it is a reference to a Berkeley developer caught crossing the US–Canada border with a bag of oregano — that was actually oregano.

"Kaffee : It was oregano, Dave. It was ten dollars' worth of oregano.

Lieutenant Dave Spradling : Yeah, but your client thought it was marijuana.

Kaffee : My client's a moron. That's not against the law.

Lieutenant Dave Spradling : Kaffee, I have people to answer to, just like you do. I'm going to charge him.

Kaffee : With what? Possession of a condiment?"

Oops. Yeah you're right. Wrong century millennium, no less!

They do mention the circuit simulator, SPICE in that same thread. But still, not this oregano for sure.

https://groups.google.com/d/msg/comp.unix.wizards/kFdPoJBpcS...