Note - Day 2 - Tangible hardware...

In a  computer ,physically connected to the computer , something tangible.
full list of component of a computer

• chassis
• Disc drive : CD ROM,CD-RW,DVD,Blu-Ray
• Expansion card
• Fan
• Floppy Drive
• Hard Drive
• Mother Board
• Power Cable
• Power Supply
• Processor

Includes or can install these components

• Flat Panel Display
• Monitor 
• Keyboard
• Mouse(coodless,foot mouse,intellimouse,j mouse,joystick,mechanical,optical,touch pad, touchball, touchpoint)
• printers
• scanner
• CD -ROM
• DVD
• CPU - brain of a computer
• HardDrive - storage of a computer
• Mother Board
• RAM - main memory ,primary memory, random access memory, system memory
• Sound card
• Video card
• modem(Internal,external,removable)
• NIC-network interface card

(content was taken from "Learn computer in 30 days" in appstore)