Vocab 1-8 Flashcards
computer
An electronic device, operating under the control of instructions stored in its own memory.
- Collects data (input)
- Processing
- Produces information (output)
application software
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computer literacy
Also known as digital literacy.
Having a current knowledge and understanding of computers and their uses.
data
A collection of unprocessed items, which can include text, numbers, images, audio, and video.
Information
Conveys meaning and is useful to people.
input device
Allows you to enter data and instructions into a computer.
hardware
Electric, electronic, and mechanical components of a computer.
output device
Hardware component that conveys information to one or more people.
system unit
Case that contains the electronic components of the computer that are used to process data.
storage media
Devices used by the computer to store data, instructions, and information.
storage device
Records (writes) and/or retrieves (reads) items to and from storage media.
communications device
A hardware component that enables a computer to send (transmit) and receive data. instructions, and information to and from one or more computers or mobile devices.
Advantages of Using Computers
- Speed
- Reliability - rarely break or fail
- Consistency - given the same input and processes, a computer will produce the same results.
- Storage - Transfer data quickly.
- Communications - share information easily and quickly
Output
Data that has been processed into a useful form.
output device
Aany type of hardware component that conveys information to one or more people. Such as:
- Display devices
- Printers
- Speakers, headphones, and earbuds
- Data projectors
- Interactive whiteboards
- Force-feedback game controllers
- Tactile output
display device
Visually conveys text, graphics, and video information.
monitor
Packaged as a separate peripheral:
- LCD monitor
- Widescreen
LCD
Liquid crystal display: uses a liquid compound to present information on a display device.
LCD monitors use a digital signal and should plug into a DVI port, an HDMI port, or a DisplayPort
The quality of an LCD monitor or LCD screen depends primarily on:
- Resolution
- Response time
- Brightness
- Dot pitch
- Contrast ratio
Resolution
The number of horizontal and vertical pixels in a display device: A higher resolution uses a greater number of pixels
GPU
The graphics processing unit: controls the manipulation and display of graphics on a display device.
Plasma monitors
Display devices that use gas plasma technology and offer screen sizes up to 150 inches.
Televisions
A good output device (Require a converter if you are connecting your computer to an analog television).
DTV
Digital television offers a crisper, higher-quality output.
HDTV
The most advanced form of digital television.
printer
Produces text and graphics on a physical medium
Printed information is called a hard copy, or printout
Print in Landscape or Portrait Orientation
nonimpact printer
Forms characters and graphics on a piece of paper without actually striking the paper:
- Ink-jet printers
- Photo printers
- Laser printers
- Thermal printers
- Mobile printers
- Label and postage printers
- Plotters
- Large-format printers
ink-jet printer
- Forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper
- Color or black-and-white
- Printers with a higher dpi (dots per inch) produce a higher quality output.
Photo printer
Produces color photo-lab-quality pictures.
- Most use ink-jet technology.
- PictBridge allows you to print photos directly from a digital camera.
- Print from a memory card and preview photos on a built-in LCD screen.
MFP
A multifunction peripheral is a single device that prints, scans, copies, and in some cases, faxes.
- 3-in-One (print, scan, copy)
- 4-in-One adds FAX
audio output device
produces music, speech, or other sounds
Voice output
Occurs when you hear a person’s voice or when the computer talks to you through the speakers.
- Some Web sites dedicate themselves to providing voice output.
- Often works with voice input.
- VoIP uses voice output and voice input.
Other Output Devices
Other output devices are available for specific uses and applications:
- Data projectors
- Interactive whiteboards
- Force-feedback game controllers
- Tactile output
data projector
A device that takes the text and images displaying on a computer screen and projects them on a larger screen:
- LCD projector
- Digital light processing (DLP) projector
interactive whiteboard
A touch-sensitive device, resembling a dry-erase board, that displays the image on a connected computer screen.
Force-feedback
Sends resistance to the device in response to actions of the user.
Tactile output
Provides the user with a physical response from the device.
System software
Consists of the programs that control or maintain the operations of the computer and its devices.
- Operating systems
- Utility Programs (Utilities)
OS
An operating system is a set of programs containing instructions that work together to coordinate all the activities among computer hardware resources.
- Start and shut down a computer
- Provide a user interface
- Manage programs
- Manage memory
- Coordinate tasks
- Configure devices
- Establish an Internet connection
- Monitor performance
- Provide utilities
- Automatically update
- Control a network
- Administer security
booting
The process of starting or restarting a computer
Cold boot
Turning on a computer that has been powered off completely.
Warm boot
Using the operating system to restart a computer.
boot drive
The drive from which your computer starts.
- You can boot from a boot disk.
- A recovery disk contains a few system files that will start the computer.
Operating System Power Configuration - Sleep mode
Saves any open documents and programs to RAM, turns off all unneeded functions, and then places the computer in a low-power state.
Operating System Power Configuration - Hibernate
Saves any open documents and programs to a hard disk before removing power from the computer.
Operating System Power Configuration - Hybrid Sleep
Combines Sleep and Hibernate
UI
A User Interface controls how you enter data and instructions and how information is displayed.
GUI
A Graphical User Interface uses icons and visual images (graphics), plus menus
Command Line Interface
A user uses the keyboard to enter data and instructions
How an operating system handles programs directly affects your productivity
- Single-user & Multi-user
- Single-tasking & Multi-tasking
- Foreground and background
- Pre-emptive Multi-tasking
- Multi-processing
Memory management
Optimizes the use of RAM (Random Access Memory).
Virtual memory
A portion of a storage medium (e.g., hard drive) functioning as additional RAM.
driver
A small program that tells the operating system how to communicate with a specific device.
Plug and Play
Automatically configures new devices as you install them.
Internet and Network connections
Operating systems provide a means to establish Internet and Network connections
performance monitor
Aprogram that accesses and reports information about various computer resources and devices.
Operating systems often provide ways to:
- Manage files
- Search for files
- View images
- Secure a computer
- Uninstall programs
- Clean up disk space
- Defragment disks
- Diagnose problems
- Back up files and disks
- Configure screen savers
swap file
The operating system swaps files to and from memory and virtual memory as needed to speed up system performance and use the physical RAM more efficiently.
thrashing
- A computer’s virtual memory subsystem is in a constant state of paging, rapidly exchanging data in memory for data on disk, to the exclusion of most application-level processing.
- This causes the performance of the computer to degrade or collapse.
paging
- One of the memory-management schemes by which a computer can store and retrieve data from secondary storage for use in main memory.
- The operating system retrieves data from secondary storage in same-size blocks called pages.
Windows Update and Mac Software Update
Can automatically install software updates
A network administrator uses the server operating system to:
- Add and remove users, computers, and other devices.
- Install software and administer network security.
server operating system
Organizes and coordinates how multiple users access and share resources on a network.
stand-alone operating system
Acomplete operating system that works on a desktop computer, notebook computer or mobile computing device:
- Windows 8
- Mac OS X
- Chrome
- Linux
Server Operating Systems
- Windows Server 2012
- UNIX
- Linux
- Solaris
- NetWare
embedded operating system
Resides on a ROM* chip on a mobile device or consumer electronic device.
- Android
- iOS
- BlackBerry OS
- Windows Phone 8
- Symbian
- WebOS
- Windows Embedded CE
- Embedded Linux
utility program
Atype of system software that allows a user to perform maintenance tasks.
file manager
A utility that performs functions related to file management:
- Displaying a list of files.
- Organizing files in folders.
- Copying, renaming, deleting, moving, and sorting files and folders.
- Creating a shortcut (known as an alias in Mac OS).
search utility
A a program that attempts to locate a file on your computer based on criteria you specify.
Virtualization
The practice of sharing or pooling computing resources.
image viewer
Allows users to display, copy, and print the contents of a graphics file.
uninstaller
Removes a program, as well as any associated entries in the system files.
disk cleanup utility
Searches for and removes unnecessary files:
- Downloaded programfiles
- Temporary Internetfiles
- Deleted files
- Unused programfiles
disk defragmenter
Reorganizes the files and unused space on a computer’s hard disk so that the operating system accesses data more quickly and programs run faster.
backup utility
Allows users to copy files to another storage medium.
restore utility
Reverses the process and returns backed up files to their original form.
screen saver
Causes a display device’s screen to show a moving image or blank screen if no activity occurs for a specified time.
personal firewall
Detects unauthorized intrusions and protects a personal computer from them.
virus
A potentially damaging computer program that has negative effects.
worm
Copies itself repeatedly in memory or over a network.
Trojan horse
Hides within or looks like a legitimate program.
antivirus program
Protects a computer against viruses.
Spyware
A program placed on a computer without the user’s knowledge that secretly collects information about the user.
spyware remover
Detects and deletes spyware and other similar programs.
adware remover
Program that detects and deletes adware.
Filters
Programs that remove or block certain items from being displayed:
- Web filtering software
- Anti-spam programs
- Phishing filters
- Pop-up blockers
file compression utility
Shrinks the size of files;
- Compressing files frees up room on storage media
zipped files
Compressed files
- Can be uncompressed with a utility program
- Some self-extract
- Most common compression type is .zip
media player
Allows you to view images and animation, listen to audio, and watch video on your computer.
Disc burning software
Writes text, graphic, audio, and video files to a recordable (R) or rewritable (RW) optical disc (typically a CD or DVD).
personal computer maintenance utility
Identifies and fixes operating system problems, detects and repairs disk problems, and can improve performance.
Green computing
Involves reducing the electricity consumed and environmental waste generated when using a computer
Strategies include:
- Recycling
- Regulating manufacturing processes
- Extending the life of computers
- Immediately donating or properly disposing of replaced computers
network
A collection of connected computers and devices, often wirelessly, via communications devices and transmission media.
Internet
A worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals.
social networking Web site
Encourages members to share their interests, ideas, stories, photos, music, and videos with other registered users.
Software
Also called a program, tells the computer what tasks to perform and how to perform them.
- System Software:
- Operating system
- Utility programs (“Utilities”)
- Application Software
Installing
Process of setting up software to work with the computer, printer, and other hardware.
programmer
Develops software or writes the instructions that direct the computer to process data into information.
personal computer
Can perform all of its input, processing, output, and storage activities by itself.
Mobile Computer
Personal computer you can carry from place to place.
- Examples include: notebook computers, laptop computers, netbooks, ultra-thins, and Tablet PCs
Mobile Device
Computing device small enough to hold in your hand.
- Examples include: smart phones, e-book readers, handheld computers, portable media players, wearable computers, and digital cameras.
game console
A mobile computing device designed for single-player or multiplayer video games.
server
Controls access to the hardware, software, and other resources on a network.
- Provides a centralized storage area for programs, data, and information.
mainframe
A large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously.
supercomputer
The fastest, most powerful computer.
- Fastest supercomputers are capable of processing more than one quadrillion instructions in a single second.
embedded computer
A special-purpose computer that functions as a component in a larger product.
Elements of an Information System
- Hardware
- Software
- Data
- People
- Procedures
native resolution
LCD’s are designed/geared for a specific resolution
Internet
A worldwide collection of networks that links millions of businesses, government agencies, educational institutions, and individuals
Internet originated as
ARPANET* in September 1969 and had two main goals:
- Allow scientists in different physical locations to share information and work together
- Function even if part of the network were disabled or destroyed by a disaster or attack
Who is in charge of the internet?
No one:
- Each organization is responsible only for maintaining its own network
- The World Wide Web Consortium (W3C) oversees research and supports Open Stand, The Modern Paradigm for Standards.
- Internet2 connects, via a high-speed private network, 220 universities, 60 leading corporations, 70 government agencies, 38 regional and state education networks, and more than 65 national research and education networking partners representing over 100 countries
high-speed broadband Internet service
- Cable Internet Service
- DSL
- Fiber to the Premises (FTTP)
- Fixed Wireless
- Cellular Radio Network
- Wi-Fi
- Satellite Internet Service
access provider
A business that provides individuals and organizations access to the Internet free or for a fee.
ISP
Internet Service Provider
- Regional ISPs provide Internet access for a specific geographical area
- National ISPs provide Internet access in cities and towns nationwide
Wireless Internet Service Provider
- Provides wireless Internet access to computers and mobile devices
- May require a wireless modem
IP address
A number that uniquely identifies each computer or device connected to the Internet
domain name
The text version of an IP address Top-level domain (TLD).