Hi all... I'm just getting started with 8051 programming and I'm assembling some parts to experiment with. Something I'm confused on is what kind of crystal I need to run the 8051. The DigiKey site includes a "load capacitance" rating for crystals, (values like 18pf or 32pf or "Series") and I don't know what I should get... Help!

I'm planning on using an Atmel AT89C52 as the processor, in case it matters. I can't find an answer on the web or in any documentation! I'm more of a CS guy than a EE guy, so the hardware stuff throws me. Thanks in advance!

-Sam