PAM is a modular system of configuration files, libraries, and executable files which guide authentication for many services.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: PAM is a modular system of configuration files, libraries, and executable files which guide authentication for many services. ### Response: T1556.003.