sentence: each of the following cpus served as the basis for a family of processors : arm dec pdp-6 , which led to the ka10 family ( used in pdp-10 , decsystem-20 ) dec pdp-11 ( influenced vax and m68000 ) intel 8008 , 8080 and 8085 zilog z80 x86-16 instruction set first used in the intel 8086 intel 8088 ( variant used in the first and early ibm pc ) intel 80186 intel 80286 ( the first x86 processor with protected mode , used in the ibm at ) x86-32 intel 80386 intel 80486 intel pentium and xeon cpus x86-64 the original specification was created by amd .