xlibprgs2.tar.Z Volume 1, "Xlib Programming Manual" for R3/R4 xlibprgs3.tar.Z Volume 1, "Xlib Programming Manual" for R3/R4/R5 xlibprgs4.tar.Z Same as xlibprgs3.tar.Z, but without Makefiles r5update.tar.Z "Programmer's Supplement for Release 5" r5errata.tar.Z "Programmer's Supplement for Release 5 errata"