DSL may refer to any of the following:
1. Short for Digital Subscriber Line, DSL is a method for home users and small businesses to have high-speed access to the Internet over standard copper lines. Capable of receiving up to 6.1 megabits per second, DSL is a great solution if it is available in your area. Because of the technology used, DSL's availability depends on the user being within a certain distance from your phone company's CO.
2. Abbreviation for Damn Small Linux, DSL is an x86 Linux distro first released on April 13, 2005. It was intentionally made small to fit on business cards, USB drives, compact flash cards and other small media that can store at least 50 MB.