Its the cabinet.
The ATX cabinet which hold motherboard, cpu, ram, hdd etc.
The motherboard
A disc is a flat object that holds computer data.
When you computer is put into standby the computer is switched to a low power state... The memory within the computer is that holds the controlled windows state is volatile, which means that only anything is stored in RAM when there is a current passing through. So when the computer is in standby the RAM is active, the CPU is active and so is the hard drive... All of these devices are powered down dramatically.
disk driver
The Bios is written in the motherboard
the motherboard
a flat object that holds computer data is a disc
Case
The motherboard
system unit is used to control the parts of the computer system
You are probably talking about the motherboard, which has every device connected to it in some way or another.
It houses the motherboard, hard drives, power supply unit and other components.
Because, it holds the computers, hard drive, fan, disc drive, ram, other key components, that laptops don't have.
The hard drive keeps the operating system. When the computer is on, some of the files get loaded on to the RAM for faster access
The mother-board holds all the important components and circuitry to enable the computer to function. It also serves as a connection point for peripherals such as the keyboard, screen, disc drives, scanners, printers etc.
Uses Of System Unit: The system unit is used to control the parts of the computer system. It also holds the different components of the computer together. The system unit stores information that controls the overall activities of the computer.
Quiver.