Information technology (IT) is the creation, processing, storage, security, and sharing of all types of electronic data using computers, storage, networking, and other physical devices, infrastructure, and procedures. Information technology can be defined as the study, design, implementation, support, or management of computer-based information systems. IT typically includes hardware, software, databases, and networks. The IT department makes ensuring that the company's systems, networks, data, and applications are all connected and working effectively. Important Points In the context of IT-Unix, Windows, and Linux are all operating systems. Register, Cache Memory, and Hard Disk are all memory modules. Accurately represent the I. T. Additional InformationOperating system- An operating system is a software program that manages and operates computing devices such as smartphones, tablets, computers, supercomputers, web servers, cars, network towers, smartwatches, and so on. It is the operating system that removes the need to understand coding languages in order to interact with computing devices. It is a graphical user interface (GUI) layer that serves as a bridge between the user and the computer hardware. Furthermore, the operating system manages a computer's software and controls program execution. Memory Module- A memory module, also known as a RAM (random-access memory) stick, is a printed circuit board that houses memory integrated circuits. Memory modules make it simple to install and replace memory in electronic systems, particularly computers such as personal computers, workstations, and servers. Therefore, the correct answer is (B) and (C) only