Compiler, Interpreter and Assembler are

System software refers to programs that manage and control the computer hardware and provide a platform for application software to run. Compilers, Interpreters, and Assemblers are specific types of system software known as Language Processors.

• Assembler: Converts programs written in assembly language into machine code.
• Compiler: Translates high-level language code into machine code all at once before execution.
• Interpreter: Translates high-level language code into machine code line-by-line during execution.

These tools are essential for the computer to understand and execute instructions written by programmers. In contrast, Hardware refers to physical components (like the CPU or RAM), and Application software refers to programs designed for specific user tasks (like web browsers or office suites).