The PB17 .pdf manual available at www.apple.com/support/powerbook, p.54, says 00. (The PB15 manual says 00 for its different memory access, but before I read that I used what I believe is a 000, specifically the nest-to-smallest in the useful Radio Shack $7.95 6-driver phillips set (two labeled #1, four labeled #0, each a different size).) On Tue, 29 Jun 2004, Robert Ameeti wrote: > Does anyone know what size phillips screwdriver is necessary for accessing the memory compartment of the 17" PowerBook? It must be either a 0, 00, 000, or a 0000 but they all are pretty close in size yet I want to purchase the correct one from a catalog.