This lot includes four Dell desktops, three of which are Dell models and one of which is an Hp. These computers are being sold for parts and are not working. They come with features such as DVD-ROM and floppy drives, and their storage type is HDD. They are suitable for office use, casual computing, and workstation needs. The operating system is not included, and they are all black and gray in color. This unit type is a tower, and the model is XPS 410. If you need additional information, please feel free to ask.