In a multiprogramming or multiprocessing environment, one or more sequencesof instructions treated by a control program as an element of work to be accomplished by a computer.任務
. In word processing, a basic unit of work to be accomplished by the operator. | 在字(詞)處理技術中，由操作員完成的一種基本工作單位。
例子3
. In IBM Series/1, the dispatchable entity used by the supervisor to establish and track concurrent program execution within the system. Each task represents a single thread of execution through a program or set of programs. The first program executed under each task is a primary program. All others are secondary programs. | 在IBM Series/1中，為了在系統中建立和跟蹤並發程式的執行，由管理程式使用的可調度實體。每個任務表示通過一個程式或一組程式執行的單一線索。在每個任務下執行的第一個程 序是主程式，其它皆是輔程式。
例子4
. In DPCX, a unit of work for the process or that is used for the execution of a program or a system function. A task is represented by a series of 256?byte blocks called the symbolic machine. | 在分散式處理控制執行程式(DPCX)中，用於執行一個程式或一個系統功能的一種處理機工作 單位。任務由256位元組塊的系列(稱為符號機)表示。
例子5
. In IBM VSE, the basic unit of synchronous program execution. A task consists of instructions operating synchronously upon program data. Although a task is executed synchronously with respect to its own instructions, its instructions are executed asynchronously with respect to all other tasks in the system. | 在IBM的作業系統VSE中，同步程式執行的基本單位。任務是由對程式數據進行同步操作的指 令所組成。雖然任務相對於它自己的指令是同步執行的，但它的指令相對於系統中所有其它 任務是異步執行的。參閱data services task, hard?copy task, operator station task, logger task。
任務