The document describes a computer system as an integrated set of devices that handle input, processing, output, storage, and communication of data. It outlines various input and output devices, including direct data entry devices and printers, explaining the differences between impact and non-impact printers in terms of speed, noise, and print quality. Additionally, it provides a brief guide on generating a QR code using an online tool.

1. The Computer System

2. The Computer System
A set of integrated devices that receive input, process, present
and store data and information.
Five main hardware components
Input
Processing
Output
Storage
Communication

3. Input Devices
Direct Data Entry Devices (DDED)
data is read directly from Sources
Examples:
Graphic Tablet
Magnetic Card
Optical Card Reader
Quick Response (QR) Code Reader
Radio Frequency Identification (RFID) Reader

4. How to Generate a QR Code
• Launch your browser
• Goto me-qr.com/qr-code-generator
• Select the File Type
• Upload your file
• Name your QR-Code
• Customize your QR Code
• Click Download.

5. Output Devices (Printers)
• Impact
• Non-Impact

6. Differences between Impact and Non-Printers
Parameters Impact Non-Impact
Mechanism In impact printers, printing is
executed by hammering a
character dye or metal pin.
In non-impact printers,
printing is executed by
dropping ink on paper in any
manner.
Speed Of Printers Impact printers are low in
terms of speed.
Non-impact printers are
comparatively fast in speed.
They can print several pages in
one minute.
Noise Of Printers They produce high-level noise
as they have many moving
parts.
They have a low level of noise.
Print Quality The print quality of impact
printers is lower.
The print quality of non-
impact printers is higher.
Printing Ink When print head strikes, then
they prefer special inked
ribbons to produce print on
paper.
They prefer cartridges or toner
for printing on paper.