IT Systems

Fig 1.1 IT Systems

An IT system is a computer-based system; a system that provides information needed for the execution of certain business processes, generally in response to a query by a user.

Below are the terms and concepts that need to be learnt;

1.Types of Computers

• laptops
• desktops computers

2. Motherboard

3. Processors

• CPU
• Microprocessor
• Clock speed

4. Primary Storage

• RAM
• ROM

5.Secondary Storage

• Optical
• Magnetic
• Solid

6. Common Input Devices

• Keyboard
• Mouse
• Touch Pad
• Microphone

7. Readers

• OMR
• OCR
• MICR
• RFID
• Barcode
• Magnetic stripes
• Smart card 

8. Visual Input Devices

• Webcam
•  Digital Video Camera
• Digital Camera

9. Sensors

• Temperature 
• Humidity
• Pressure
• Light

10. Touch Screen

• Leahana

11.Output Devices

• Printer
• Projector
• Monitor
• Speakers 

12. Composite Devices

• Game Controllers

Source

• “Design Patterns and Refactoring.” SourceMaking, sourcemaking.com/uml/basic-principles-and-background/information-systems-and-it-systems.

TOP