When you see (IAF) that stands for Initial Approach Fix...what about when you don't see (IAF) and you see (IF)...what does that mean?! I have checked the plates front to back to see if I could find the symbol...I saw this on the straight in ILS approaches at ADDISON, TX. I have also seen both of those symbols on ADDISON GPS approaches. I am guessing it stands for Initial fix when you do straight ins but I don't want to guess. Thanks all!