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COMPUTERS – PART II
ELEMENTS OF COMPUTER SYSTEM
Peopleware:
Hardware:
– Memory
– Arithmetic Logic Unit (ALU)
– Control Unit

Software
– Ope...
Peopleware
This is the most important element of the
computer system.
It consists of any computer literate person. This
in...
Hardware
Is made up of the tangible parts of the computer system or
the physical components of the computer system. This
i...
Software
It is the programs that facilitate the usage of the computer. It is the intangible part
of the computer system. T...
Software
2. Application Software:
Programs that perform specific tasks or functions. Type
of application programs include:...
Input Devices/Technologies
Keyboard:
Joystick:
Touchpad:
Scanners
– Magnetic-ink character recognition (MICR):
– Optic...
Output Devices/Technologies
 TFT (Thin film Transistor)
– LCD – Liquid crystal display
– LED – Light emission diode

 Im...
Storage Devices/Technologies
Diskette:
Pen/flush drive
Optical disks:
–
–
–
–

CD-ROM disks (Compact Disk Read Only Mem...
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Computers part 2 DE L200

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Computers part 2 DE L200

  1. 1. COMPUTERS – PART II
  2. 2. ELEMENTS OF COMPUTER SYSTEM Peopleware: Hardware: – Memory – Arithmetic Logic Unit (ALU) – Control Unit Software – Operating Systems Software (OS) • Server OS • Client OS – Application Software
  3. 3. Peopleware This is the most important element of the computer system. It consists of any computer literate person. This includes – ordinary users and computer professionals- coders, data entry clerks, – programmers, system analysts, designers, operators, etc.
  4. 4. Hardware Is made up of the tangible parts of the computer system or the physical components of the computer system. This includes the monitor / visual display unit (VDU), keyboard, mouse, and the systems unit (central processing unit). The CPU is divided into three: – Memory, which is used for storing data, information and programs. – Arithmetic Logic Unit (ALU): this is where arithmetic and logical operations take place. – Control Unit: controls and coordinates the activities of the other components of the computer system.
  5. 5. Software It is the programs that facilitate the usage of the computer. It is the intangible part of the computer system. There are three basic types of software: 1. Operating Systems Software (OS) Generalized programs that manage the resources of the computer. The most important kind of the system software is the Operating System (which manages and controls the activities of the computer and also enables us to run application programmes). – Server OS • Windows Server 2000, 2003, 2008 • Linux Redhat – Client OS • • • • • • Microsoft (windows ’95, windows ’98, Windows Me, Windows XP, Windows Vista, Windows 7, 8 etc.) UNIX, OS/2, Linux (Ubuntu), Android 2.0, 4.0 Symbian, etc.
  6. 6. Software 2. Application Software: Programs that perform specific tasks or functions. Type of application programs include: – – – – – – – – Word Processors Electronic Spreadsheet Database Management Systems Desktop Publishing programs Presentation Graphics Utility Software Edutainment Application Entertainment Applications
  7. 7. Input Devices/Technologies Keyboard: Joystick: Touchpad: Scanners – Magnetic-ink character recognition (MICR): – Optical mark recognition (OMR): – Optical character recognition (OCR):
  8. 8. Output Devices/Technologies  TFT (Thin film Transistor) – LCD – Liquid crystal display – LED – Light emission diode  Impact printers – A dot-matrix printer – Line Printer  Nonimpact Printers – Laser printer – Ink-jet printers  A plotter – Ink-jet plotter – Electrostatic plotter
  9. 9. Storage Devices/Technologies Diskette: Pen/flush drive Optical disks: – – – – CD-ROM disks (Compact Disk Read Only Memory) CD-R disks (Compact Disk Recordable) CD-RW disks (Compact Disk Re-Writable) DVD/DVD-ROM (Digital Versatile/Video Disk Read Only Memory) Magnetic Drives (HardDisk, RAID)

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