Final answer:
The generation using abbreviations such as ADD is the second-generation of programming languages, also known as assembly languages. These languages use mnemonics converted by an assembler into machine code.
Step-by-step explanation:
The programming generation that uses abbreviations or mnemonics such as ADD, which are automatically converted to the appropriate sequence of 1s and 0s, is known as the second-generation of programming languages. Second-generation programming languages are typically referred to as assembly languages. They are one step above the machine code (first-generation language) and provide a more human-readable way of coding, although they still maintain a close-to-hardware level of detail and efficiency. Instructions in assembly language are usually written as short mnemonics like ADD for addition, SUB for subtraction, and so on, which a program called an assembler then converts into the specific machine code that the computer's processor can execute.