Monitor - a screen that displays an image generated by a computer. Traditionally the monitor was an output device, but a touch screen monitor is considered both an input and an output device.
Keyboard - a panel of keys that operate a computer. The keyboard is an input device.
Hard Disk Drive - a data storage device used for storing and retrieving digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.
SSD (solid state Drive) -