Chapter 2: Basic Componets of Computer

• Input Devices: Keyboards,pointing devices(mouse)
• Output Devices: Display or video monitor, printer, speakers, Central Processing Unit(CPU).

Memory and Storage Devices

• Primary Storage: RAM (Random Access Memory)
• Secondary Storage: Storage devices that serve as long term repositories for data:
• Hard Disk Drives
• Recordable CD and DVD drives
• Tape Drives

Information

• Information: communication that has value because it informs . Data=Information
• Computer's information is digital.
• Bit or Binary digit
• The smallest unit of information.
• Can have one or two values:0 or 1.
• Can represent numbers,codes, or instructions.
• Byte: a collection of 8 bits.
• Bit:0,1
• Using two symbols all numbers can be represented on a calculator as well as performing arithmetic.
• A calculator translates the touch on the numeric keypad into a series of 0's and 1's.