SSTL may refer to: Stainless steel, a corrosion-resistant steel alloy Stub Series Terminated Logic, a group of electrical standards for driving transmission lines Surrey Satellite Technology, a British satellite manufacturer Sistema Shyam TeleServices Limited, a joint venture between Sistema (LSE-SSA) of Russia and Shyam Group of India, to form MTS India Site Specific Target Level, a target used in the remediation of contaminated land