Memory Help Scavenger Hunt

OK hears the deal, I have this paper for school which is a scavenger hunt for topics you have to look up on the internet. I have been searching for a few hours on a specific question on a type of memory. I will post the question below and any information you could give me aswell as the type of memory this question ask for, would be of great help to me.

Here is the question:

1. Your textbook discussed RAM, ROm and PROM. There is another type of memory that retains its contents until it is exposed to ultraviolet light. What is the name of this type of memory?

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That was the question, so if anyone could help me, it would be awesome.

Thanks ahead of time,
DIGITALshimmerz

EPROM

http://www.google.nl/search?q=cache:...hl=nl&ie=UTF-8