Could be second or all of above
Answer:
RAM and Hard Drive
Explanation:
An FRU is also called a Field-repleacable Unit and is usually an assembly that is easily removed from an electronic equipment, laptop or just a computer and replaced so that one does not have to take the entire system for repairs. When trying to equip yourself with this unit of a laptop, you must take your Random Access Memory and your hard drive as they contain the whole information on the laptop.
MS-DOS is a command-line operating system.
Therefore, the best answer is Command-line.
<span>Before GUIs became popular, the command line interface (CLI) was the most commonly used.
</span>GUI stands for Graphical User Interface . Like its name says it is a graphical interface <span>that allows interaction with users through graphical icons and visual indicators , rather than through text-based interface.</span><span>
Command line interace (CLI) is text-based interface in which </span>the user <span>issues commands to the program in the form of successive lines of text.</span>
