HP 5062-6976 - Serial controller board - Interface, keyboard, and mouse - For use with HP Vectra 486 series Retail
HP 5062-6924 - Memory board - For use with HP Vectra 486 series - Memory Board - Plugs into System Interface Board Retail
HP 5062-6954 - System processor board - For use with HP Vectra 486 series - System Processor Board - Plugs into System Interface Board Retail