Performing background processing which is not on-line or directly connected to the computer for on-line operation. High priority programs take precedence over specific background jobs. 指實(shí)現后臺處理。所謂后臺處理是指非聯(lián)機處理，或者說(shuō)不是直接和計算機連接起來(lái)而進(jìn)行聯(lián)機操作。優(yōu)先級高的程序先于特定的后臺作業(yè)執行。
An important processing procedure in which top-priority processing most often results from real-time entries which usually have precedence, through the use of interrupts into lower-priority or background processing. 一種重要的處理過(guò)程，其中最高優(yōu)先權處理任務(wù)常常由具有優(yōu)先度的實(shí)時(shí)任務(wù)形成，經(jīng)過(guò)使用中斷而進(jìn)入較低優(yōu)先權任務(wù)或后臺處理任務(wù)。
