Because of the different input and output requirements, there are differences between the SBCS system hardware and DBCS system hardware. The SBCS hardware is such as the IBM PS/2 or PS/VP. The DBCS hardware is known as the IBM PS/55 or PS/V. The DBCS OS/2, from versions 2.0 support some SBCS system hardware and also some personal computers hardware of local PC makers. The DBCS OS/2 also runs on the PS/2 and PC AT compatible hardware. Most IBM customers in far east Asian countries run their OS/2 application programs on the DBCS OS/2 with the DBCS system hardware that are announced and supported officially by IBM of the far east Asian countries, the PS/55 and PS/V. Most of the differences are hidden by the operating system.