RSDL may refer to:
RESTful Service Description Language, an XML description of HTTP-based web applications Rotating Staircase Deadline, a Linux CPU scheduler Rail Simulator Developments Ltd, a developer of Rail Simulator Reactive skin decontamination lotion; See Dry decontamination Reverse spiral dual layer, a DVD format; For example See Intimate and Live Residential Surveillance at a Designated Location, a form of detention in the People's Republic of China Russian Social Democratic Labour Party