Chapter 3 The Visible Computer Flashcards
What is computer
A computer is an electronic machine that processes raw data to give information as output. It takes inputs and process it under the influence of a set of special instructions called programming to produce the desired outputs
Two parts of PC
- Hardware
- Software
Four stages of computing
- Input
- Processing
- Output
- Storage
What is system unit
The system unit, also known as the central processing unit (CPU) or computer case, is the main component of a computer that houses critical hardware components. It typically includes the CPU, motherboard, memory (RAM), storage devices, power supply, and various other internal components. The system unit is the “brain” of the computer, where data processing and calculations occur.
What is peripheral devices
Peripheral devices are hardware components that connect to a computer’s system unit to provide additional functions and capabilities. These devices are used to input data into the computer or receive output from it
Input devices
- Input Devices:
• Keyboard: Used for typing text and inputting commands.
• Mouse: Provides a pointing device for selecting and interacting with on-screen objects.
• Scanner: Converts physical documents or images into digital data.
• Webcam: Captures video and images for video conferencing or recording.
Output devices
. Output Devices:
• Monitor/Display: Shows visual output such as text, images, and videos.
• Printer: Produces hard copies of documents or images.
• Speakers: Provide audio output for music, videos, and other multimedia content.
Storage devices
Storage Devices:
• External Hard Drives: Used for additional data storage.
• USB Flash Drives: Portable storage devices for transferring data.
• Optical Drives: Read and write data to CDs, DVDs, and Blu-ray discs.
Networking devices
Networking Devices:
• Network Adapters: Enable computers to connect to wired or wireless networks.
• Modems: Connect to the internet via a telephone line or cable connection.
A Plug
A plug is a part with some type of projection that goes into a port.
A port
A port is a part that has some type of matching hole or slot that accepts the plug.
Jacks
The term jack is used as an alternative to port, so you may also put a plug into a jack.
The connectors
The term connector describes either a port or a plug.
Mini- DIN connectors
It used to connect the keyboard and mice .
USB connector
Universal serial Bus
Universal serial bus (USB) provides the most common general-purpose connection for PCs. You’ll find USB versions of many devices, such as mice, keyboards, scanners, cameras, and printers.
Types of USB connectors
- USB A
- USB B , mini B
- USB TYPE C
Hot- swappable
First, USB devices are hot-swappable, which means you can insert or remove them without restarting your
Fire Wire connectors
Also known as IEEE 1394, the FireWire interface is perfect for high-speed devices such as digital video cameras. PCs rarely have built-in 4- or 6-wire FireWire connectors, so users typically purchase a FireWire adapter card. Fire Wire devices are hot - swappable
DB connector
DB connectors come in a variety of sizes, but only one shape. You’ll find only a few DB connectors on modern PCs, primarily for printers and video.
RJ connectors
Modern PCs use only two types of RJ jacks: the RJ-11 and the RJ-45. The phone jack is an RJ-11. It is used almost exclusively for modems. The slightly wider RJ-45 jack is used for your network connection.
Mini-audio connectors
Speakers and microphones connect to audio jacks on the system unit.
The most common type of sound connector in popular use is the 1/8-inch connector, also called a mini-audio connector.
Keyboard connect with computer
Mini-DIN port or USB port
Monitor connects with computer by
- VESA ( video electronics standards Association
- DVI ( digital video interface)
- HDMI ( Hi- Definition Multimedia Interface)
Sound
S/PDIF ( Sony / Philips Digital Interface Format)
