Unit 1- Digital Devices Flashcards
What is a computer?
A computer is an electronic device capable of taking an input, processing data, storing information and providing an output
Data that is input, is raw, unprocessed information
Information is data that people understand
What is a mainframe computer?
A mainframe computer is a computer with huge processing power and data storage capabilities
Built to handle enormous amounts of data and carry out complex calculations
Designed to be secure, reliable and support large volumes of simultaneous users
Where are mainframe computers commonly used?
Carry out critical tasks for large organisations in sectors such as:
-Finance
-Health
-Government etc.
What is a microprocessor?
A microprocessor is an integrated circuit (IC) that contains a central processing unit (CPU)
A microprocessor is embedded into devices to help them carry out tasks
The microprocessor is responsible for executing instructions
Where are microprocessors commonly used?
Microprocessors are used in a home to monitor and control devices such as:
-Central heating systems
-Security alarm systems
-Home entertainment system etc.
What is a desktop computer?
A desktop computer is a computer designed to stay in one place, for example on a desk
A desktop computer traditionally consists of a separate:
Monitor
Computer
Keyboard & mouse
Desktop computers are typically more powerful than mobile computers
Desktop computers are upgradable, the parts can be replaced/changed to increase performance
What are the uses of desktop computers in office and business?
word processing, financial modelling, email, video/image editing
What are the uses of desktop computers in education?
online learning, research, content creation, multi media presentations
What are the uses of desktop computers for gaming and entertainment?
online gaming, streaming music/film/tv, social media, online browsing
What is a laptop computer?
A laptop computer is a computer designed to be portable
A laptop computer traditionally consists of built-in: Monitor, Computer, Keyboard & trackpad or touch screen keyboard & pointer
- not easily upgradable, components are integrated for size and efficiency
- battery powered
- used as desktop replacements
Why are Laptop computers typically less powerful than desktop computers?
- Power constraints due to size
- Focus on extending battery life
What are the advantages of laptop computers?
- easy to carry and use on the go (portability)
- access to internet and resources from anywhere (flexibility)
- can use for various tasks and activities (multi- functionality)
What is a mobile phones?
A mobile phone is an ultra portable electronic device designed to be lightweight and fit in a pocket or small bag
Mobile phones are used to transmit information between people and devices using radio waves
What are two examples of mobile phones?
- Smartphones
- Specialist
What is a smartphone?
- a versatile general purpose device
Smartphones use subscriber identity module (SIM) cards to link the devices to a network carrier, allowing them to make phone calls and send messages
What are the features of smartphones?
- SMS messaging
- phone calls
- voice over internet protocol
- accessing the internet
- mobile payments
What is a description of SMS messaging?
- Quick communication
- Messages are stored on the device and can be read at any time
- Use virtual keyboards and predictive text
What is a description of phone calls?
- simple voice communication
- requires cellular reception
What is a description of Voice over internet protocol?
- Audio & visual communication via the internet
- Requires extra apps installed on the devices
- Can make & receive calls via smartphone, tablet and computers
- Requires a forward facing camera for video calls
What is a description of accessing the internet?
- Requires cellular reception to access on the move
- Web pages are optimised for smartphone access
- Automatically used Wi-Fi when in range and connected
What is a description of mobile payments?
Uses NFC
What is a description of a camera?
- Smartphones have built-in cameras for video calls
- Camera can act as a barcode scanner for QR codes
What is a specialist phone?
A specialist phone is designed for a particular groups of users or environment
They prioritise specific features over general purpose use
What are the specialist features of senior phones?
- Larger buttons
- Easy to read displays
- Simplified user interface
- Emergency alert buttons
- Hearing aid compatibility