What is a computer?What is the weakness of computer?
Topic in the presentation is
Block diagram of a computer
At the end of this session, the learner will beAble to:
Draw and explain a block diagram of computerIdentify input deviceIdentify output device
Input UniteArithmetic logic unit(ALU)
CPU
Output UniteMEMORY
Block diagram of a computer
This is the process of entering data and programs in to the
computer system.
Input unit:
Input device
Mouse
Scanner
Keyboard
Webcam
Microphone
Joystick
CentralProcessingUnit:
The control unit and ALU of the computer are together known as the Central Processing Unit (CPU).TheCPUis like brain performs the following functions
CPU
Microprocessor
Storage Unit: The storage unit of the computer holds data and instructions that are entered through the input unit, before they are processed.
Harddisk RAM
Portable harddisk
OutputUnit:
The output unit of a computer provides the information and results of a computation to outside world. Printers, Visual Display Unit (VDU) are the commonly used output devices.
Output device
Monitor
SpeakerPloter
Printer
Projector
Line printer
1.Is mouse a output device?
2.Write the abbreviation of ALU ?
Home work:1.Draw a block diagram of a computer
2.List the name of input and output device of a desktop computer