1. 程序：
程序，顾名思义，就是由程序员用编程语言开发的一组简单的指令，由编译后的代码组成，直接从计算机操作系统运行。
2. 命令：
命令，顾名思义，是用户给计算机执行特定任务的指令，由用户通过命令行转发给操作系统，由应用程序和用户界面发起。
程序和命令的区别：
| Program | Command |
|---|---|
| Programs are collection of instructions understandable by CPU. | Command are orders to computer program to perform particular task. |
| Programs are instructions created by programmer or software developer. | Commands are instruction given by user to computer. |
| It is used to indicate that which operating CPU should execute on set of data. | It is used to tell application or system to do something or perform task. |
| Types of programs include word processors, game programs, graphic programs, data base systems, etc. | Types of command includes input program commands, utility commands, internal command, external command, etc. |
| These are files stored in one of bin directories like /bin, /usr/bin, /usr/local/bin. | It comes in different forms i.e. special words that program understand, function keys, buttons, etc. |
| Programs are handled by programmer who write compute programs. | Commands are handled by part of operating system i.e. command interpreter. |
| Translators transform entire program form one language to another, interpreters execute program sequentially at each step, debuggers execute program allowing programmer to check operation of program. | These are issued by typing them in command line and then pressing enter. |
| Computer without programs is just considered as dump box because these programs make computer active. | Computer without command is useless because there users give command to computer to specific task and if there will be no user then computer is just a dump box. |