I'm surprised they didn't have one at Radio Shack. Try other computer stores, Best Buy, etc. TI sells them mail-order if you still can't find one. > I bought the TI-Graphlink only package but I just found out I have a 9 >pin serial port. I went to Radio Shack and they only have a 9 pin to 25 pin >adapter. Where could I find a 25 pin to 9 pin adapter? Thanks in advance.