The Free On-line Dictionary of Computing (30 December 2018):

local bus

    A bus connecting a processor to memory,
   usually on the same circuit board as opposed to a
   backplane and therefore faster.

   Various proprietary local busses for personal computers are
   still in use.  The most common are Vesa local bus (VLB or
   VL), and Peripheral Component Interconnect (PCI).  Some
   computers, e.g. notebook computers, use a local bus with no
   expansion slots.  Previous non-local bus standards include
   ISA, EISA and MCA.

   (1997-08-25)