Support for multiprogramming and memory protection would be built in. This is a crude form of hardware multiprogramming. MVS maximized processing potential by providing multiprogramming and multiprocessing capabilities. The long-term scheduler is responsible for controlling the degree of multiprogramming. It was a multiprogramming and multiprocessing operating system with fully symmetric processor management. The FP6000 was an advanced design, notably including hardware support for multiprogramming. Prior to the advent of multiprogramming, computers operated as single-user systems. It included multiprogramming and operated on multiple CPUs. A multiprogramming or multitasking OS is a system executing many processes concurrently. In 1969, their effort resulted in the completion of the RC 4000 Multiprogramming System. The broadcast providers adopt either high-definition television format or its standard definition multiprogramming. This feature (described as "multiprogramming") already was available in the two higher models. That system eventually became known as THE multiprogramming system. Third-generation computers capable of multiprogramming began to appear in the 1960s. The KDF9 was one of the earliest fully hardware-secured multiprogramming systems.