B.E.
Good luck and dress professionally! Even in today's casual dress environment, you can't go wrong with a nice dress pantsuit or at least a conservative blazer.
I used to do a lot of interviews and have seen a lot of DON'TS down through the years. I think the funniest one was when we had a WANG position open (I am dating myself now, who remembers WANG anymore?) and a woman showed up dressed in a clown outfit. I can't remember whether she was just coming from a kid's birthday party or if she was just handing out leaflets on the street, but yes, she came dressed as a clown. Big shoes. Striped costume. Pom-pom buttons. Red wig. You get the idea. To top it all off, she was unbelievably grumpy. Nothing like interviewing a bad-tempered clown for a word processing position. Needless to say, she didn't get the job!