1. UNIX：
UNIX是最初由AT＆T贝尔实验室开发的功能强大的多用户多任务操作系统。该操作系统由于其最令人赞赏的功能(如灵活性，可移植性，网络功能等)而在科学，工程和学术界非常受欢迎。
2. Windows：
Microsoft窗口是最苛刻的基于图形用户界面(GUI)的操作系统，它将所有基于命令行的功能替换为用户友好的屏幕。 Microsoft推出了具有最新功能的一系列版本。
UNIX和Windows操作系统之间的区别：
| Sr. No. | Basis | UNIX | Windows |
|---|---|---|---|
| 1. | Open Source Code | It is an open source code. | It is not an open source code. |
| 2. | Stability | It is more stable. | As, multiple programs are running. So it is unstable. |
| 3. | Case-sensitivity | It is case sensitive. | It is not a case sensitive. |
| 4. | File-extension | In this, extensions have not affect on the type of file. | In this, certain file extensions are used to identify the type of file. |
| 5. | Device drive | In this, several ways are used to manage the device drivers. | After the installation of Windows, the various device-drivers packages provide interactive GUI for the configuration of devices. |
| 6. | Recovery | We cannot recover our data. | In this, we can recover our data from the recycle-bin, because in this after the deletion of data it will store in the recycle-bin. |
| 7. | Processing Power | It has greater processing power. | It has less processing power. |
| 8. | Security | It has greater in-built security. | It has less in-built security. |
| 9. | Virus Attacks | It has interface between user and kernel known as shell, so it does not face any virus attack. | In this, we don’t have shell interface. User direct interact with hardware and it enhances the attack of virus. |
| 10. | File-system | In this, file system is represented as a hierarchical tree under the same root. There is no drive system like drive C, drive D etc. | In this, file system can have many hierarchies; for example, different file system for each partitions and these partitions are represented as drive alphabet letters like as C: D: etc. |