Tails are an anonymous computer software system that aims to keep your privacy and security at all times. It helps you use the Internet safely and discreetly without revealing your real identity even if you are using the Internet on public Wi-Fi, at public places such as parks, libraries, schools, malls, airports, and coffee shops, and any other place where your activity can be watched by someone else. It is basically a fully-functional operating system, which is designed for use from a CD, DVD, or flash drive, separately from the normal computer operating system, without the need for installation into the main computer. It offers complete protection against online spyware, adware, malware, Trojans, hackers, and viruses. Tails do not leave your online identity and private information available for anyone to see, nor does it collect any personal information from you, for example banking details or credit card numbers. This means that no hacker will have access to your financial and personal details when using this application. It does not log keystrokes, and so there is no need for tracking your every movement. Tails does not use up your data storage space, and it is extremely lightweight, making it easy to transfer it from one computer to another. It also requires very little memory space, so you will never run out of space to download your favorite software applications. However, there are a few problems with using free software downloads and other downloads that can make Tails unusable. The first is that the free downloads do not provide you with enough space to install and use Tails. Second, some free software applications for Tails include adware, and many of them use up your computer's memory space, which means that you will never be able to download all your favorite programs without running out of disk space.