Hardware refers to the physical, tangible components of a computer system, while software refers to programs and instructions. Random-access memory, or RAM, is hardware because it is a physical set of memory chips installed in the computer, typically on removable modules. RAM provides temporary working storage for the operating system and applications while they are running, allowing fast read and write access compared to long-term storage devices. A compiler is software that translates source code into machine code. The kernel is software and is the core part of an operating system that manages resources such as processes, memory, and device access. The operating system itself is also software that controls the computer and provides services to applications. In Information Technology fundamentals, distinguishing hardware from software is a key concept: hardware includes CPU, RAM, motherboard, storage, and peripherals; software includes the operating system, applications, and programming tools. Since RAM is a physical component, it is the correct answer for the hardware part listed.