Chapter s Operating System 5.2 Evolution of os function Jobs, programs and processes A program is the classical view of a computation. It consists of a set of program units, including program units obtained from libraries, which constitute an object code to be executed. A process is an execution of a program or of a part of a program. It differs from a program when concurrent programming techniques are used for coding the program. In such a case many processes can execute a program or a part of a program. 程序是计算的传统观点,它由一系列程序单元构成,包括从库 中获取的程序单元,并组成可执行的目标代码。进程是一个程 序或一个程序部分的一次执行。在应用并行编码技术时,许多 进程可以执行同一程序或其一部分,这时进程与程序是不同的。Chapter 5 Operating System 计算机专业英语 5-31 Jobs, programs and processes A program is the classical view of a computation. It consists of a set of program units, including program units obtained from libraries, which constitute an object code to be executed. A process is an execution of a program or of a part of a program. It differs from a program when concurrent programming techniques are used for coding the program. In such a case many processes can execute a program or a part of a program. 程序是计算的传统观点，它由一系列程序单元构成，包括从库 中获取的程序单元，并组成可执行的目标代码。进程是一个程 序或一个程序部分的一次执行。在应用并行编码技术时，许多 进程可以执行同一程序或其一部分，这时进程与程序是不同的。 5.2 Evolution of OS Function