Unit 1 Flashcards
Input
Initial message
Storage
storing the steps taken to complete a task to be used again
Processing
the steps taken to complete the task
Output
the final product
Computer
a machine that can complete tasks
Motherboard
Main circuit of the computer allows connection between different parts of the computer. (nervous system)
CPU
Central processing unit. Executes all commands. If it’s not working, nothing will operate. Measured in Hertz (brain)
Video Card
Graphics processing unit. Displays what you see and handles heavy tasks. Handles all visual data and measured in Hertz (eyes and muscle)
RAM
Random access memory.
“Short term memory”. Temporary space for the CPU to work. What’s needed to do the task at hand. Measured in Bytes (desk top in class)
Hard Drive
“Long term memory”. Storage for all software (files, apps, programs, operating systems) Measured in Bytes
Power Supply
“Energy” Supplies all parts of a computer with power
Network Card
Allows your computer to connect to the internet
Case
Hold everything together (skin)
Bit
binary digit
Byte
a group of bits, typically 8
2^n
decimal to binary equation
Overflow
an error that occurs when a program recieves more information that it can handle
Rounding Error
when a computer is not able to represent a number exactly, so it much round to get as close as it can
ASCII
American Stardard Code for Information Interchange. the universal conversion from bits to letters, symbols, etc…
Abstraction
retaining important information and throwing out everything else
Pixel
unit of programmable color on a computer display
Sampling Frequency
the amount of pixels present on a display that can be used
analog image
a physical painting or drawing
digital image
an image that has been downloaded and converted onto a device
RLE
run length encoding. lossless data compression that finds repeated sounds or words and creates symbols to represent them, shortening the total message
Lossless Compression
a version of compression where no data is lost and it is completely reversible
Lossy Compression
a version of compression that loses some data, as unnoticeable as it may be, that cannot be reversed
Intellectual Property
something you think up that you own
Copyright
the legal right of a creator to decide what can done with their work
Creative Commons
a non-profit organization that can be used to license your work that controls how it is distributed
