BNU was mainly used with DOS-based Bulletin Board System (BBS) software written in the late 1980s to mid-1990s.
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: BNU was mainly used with DOS-based Bulletin Board System (BBS) software written in the late 1980s to mid-1990s. ### Response: .