OTA MASTER, SYSTEM, METHOD, NON-TRANSITORY STORAGE MEDIUM, AND VEHICLE

An OTA master configured to control a software update on a first electronic control unit mounted on a vehicle and a software update on a second electronic control unit mounted on the vehicle includes one or more processors. The one or more processors are configured to separately receive a first distribution package of update data for the first electronic control unit and a second distribution package of update data for the second electronic control unit from a center. The first electronic control unit includes a non-volatile memory of a first type including one storage area. The second electronic control unit includes a non-volatile memory of a second type including two storage areas. The one or more processors are configured to perform the control of the software update in parallel on a plurality of the electronic control units to be updated, based on the received update data.