先来先服务调度算法（FCFS）：每次调度都是从后备作业队列中，选择一个或多个最先进入该队列的作业，将它们调入内存，为它们分配资源、创建进程，然后放入就绪队列。在进程调度中采用FCFS算法时，这每次调度是从就绪队列中，选择一个最先进入该队列的进程，为之分配处理机，使之投入运行。该进程一直运行到完成或发生某事件阻赛后，才放弃处理机。

最短作业优先（SJF）：每次从后备队列中选择一个或若干个估计运行时间最短的作业，将它们调入内存运行。

-FCFS scheduling algorithm (FCFS): each is from the reserve job queue scheduling, select one or more of the first job into the queue and put them into memory, as they allocate resources, create a process, and then put into the ready queue. In the process, the use of FCFS scheduling algorithm, this time from the ready queue scheduling, select one of the first process into the queue for it and assign processors to make operational. The process has been run to completion or stop an event occurs after the game, only to give up processor. Shortest job first (SJF): Select a time from the backlog is estimated to run one or several shortest job transferred to the memory to run them.