It's good, as far as I can remember. I still pull it out on rare occasion to look up their section on numerical base conversions. It has great explanations for those...
@Cubbie
You are mistaken. x86 also can be written as 8086. So there are three common digits among total four digits.:)
8085, not 8086. 8085 uses a completely different instruction set, the 8080. x86 dates back to the original 16 bit 8086, though it is an instruction set supported up to many of the 32 and 64 bit (real mode) microprocessors we have today, with a few extra instructions introduced.
From what I've read 8086 gave birth to x86, but I never saw anything about them being the same. :/
They are not the same thing. x86 refers to the instruction set that intel initially assigned to their microprocessors, the first being the 8086, though many other manufacturers have also supported the set.