Problem producing files for the printers

ok I’m getting a business card printed but being a web developer who has a grasp on photoshop and a very shaky grip on illustrator I need help.

The printer says he needs

3mm bleed all round - Done
PDF Files - Done
High Res - Done
In two spot colours - ehrmmm…help

I’ve produced the card in Photoshop. And produced the pdfs as well but I have no idea what he means by two spot colours. The images are in only two colurs but he says they’re full colour files and again, I’m not sure what he’s talking about.

Any helps appreciated :beam: