DOS： DOS 代表磁盘操作系统，它是一种直到 1995 年在 IBM PC 中流行的操作系统。它是一个单任务操作系统，即一次可以执行一项任务。它基于命令行界面，我们必须以命令形式向计算机提供指令。它从硬盘、软盘或任何其他存储设备运行，从而为程序的执行提供环境。它占用更少的内存。为了使用超过 64kb 的内存，使用了内存扩展器，旧的 Windows 使用更多的内存。它最初只发布给 OEM(原始设备制造商)增加了对他们的硬件的支持，它最终发布到公众。
Windows： Windows 是微软的产品，它是一个有各种版本的操作系统，Windows 10 是最新版本。它是基于图形的用户界面，用户通过鼠标、键盘点击或选择图标和图像来发出命令或触摸屏到计算机。 Windows 最初是运行在 DOS 之上的 DOS 扩展程序。由 Windows 95、Windows 98、Windows 98SE 和 Windows ME 组成的 Windows 9x 系列运行在 MS-DOS 之上，能够直接运行 DOS 程序。Windows NT 是单独发布的并且是可移植的，最初，它是用 C 和 C++ 语言编写的，其中处理器可靠性代码分为 DAL 和 HLL，旨在比 DOS 和 Windows 9x 系列更安全。Windows NT 系列包括 Windows NT 3.x,4 .x、Windows 2000、Windows XP、Windows Vista、Windows 7 等。Windows 比 DOS 更可靠，并且由于有各种可用于调试和错误处理的工具，因此可以轻松处理错误。
下表列出了 DOS 和 Windows 之间的差异：
.差异表{
边框折叠：折叠；
宽度：100%；
}
.Difference-table td {
文字颜色：黑色！重要；
边框：1px 实心 #5fb962;
文本对齐：左！重要；
填充：8px；
}
.difference-table th {
边框：1px 实心 #5fb962;
填充：8px；
}
.差异表tr>th{
背景颜色：#c6ebd9；
垂直对齐：中间；
}
.Difference-table tr:nth-child(odd) {
背景色：#ffffff；
}
| Feature | DOS | Windows |
|---|---|---|
| Type | DOS is command line based OS, where instructions are given through commands. | Windows is GUI based OS, where instructions are provided with the help of images and icons. |
| Drivers | There was originally no concept of Drivers in the DOS.It was eventually introduced to provide support for various hardware | Windows makes use of Drivers to make the work easier. |
| Multi- tasking | DOS doesn’t supports multi-tasking.DOS Extenders are used to provide more feature to DOS computers. | Windows support multitasking. |
| Complexity | DOS is more complex and difficult to use. | Windows is less complex and is easy to use. |
| Input System | Commands through keyboard are provided as an input. | Keyboard,mouse,touchscreen or any other input device can be used to provide the input to Windows. |
| Storage size | Highest storage size that was made available is 2 GB. | Windows support storage size up to 2 terabyte(MBR partition) and 64 zettabyte(GUID partition). |
| Usage | DOS is not popular now and almost obsolete in use.FreeDOS is often bundled with some cheaper laptops. | Windows is more popular and globally used desktop operating system. |
| Price | DOS is free and does not use licensing,(MS-DOS is abandonware now and FreeDOS is developed as an open source alternative) | Windows is a paid software and requires license for activation. |