Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TRS 80 MODEL 4 found under Computer System Digital by Radioshack Corporation. The National Stock Number assigned to this part is 7010012602985, and the Federal Supply Class is 7010 Adpe System Configuration. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TRS 80 MODEL 4.