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

Intel 8751

    A microcontroller from Intel including a
   CPU, two timers.  128 bytes of RAM, 4 kBytes of EEPROM,
   four eight-bit biderectional I/O ports and an EIA-232 port.

   The 8751 belongs to the Intel i51 Microcontroller family.  It
   was designed by Intel but is now manufactured by Intel,
   Philips, Siemens, AMD and others.  Motorola's
   microcontroller families (68HC05, 68HC08 and 68HC11) are meant
   to compete with the i51 family.

   (1995-04-22)