Could this be a part number for a circuit board, IC (integrated circuit), or a specific hardware module? If so, details like its technical specifications or usage in a device would help.
The golden era of arcades (1988–1995) saw NEC µPD series chips driving sprite generators or sound sequencing. Dumps of arcade ROM sets sometimes include files named upd09051bin as part of MAME (Multiple Arcade Machine Emulator) metadata. upd09051bin