Unit 1 Vocab Flashcards
Computing Innovations
an innovation that includes a computer or program code as an integral part of its functionality
Binary Question
a question to which there are only two possible answers.
Binary Message
a message that can only be one of two possible values.
Bit
A contraction of “Binary Digit”. A bit is the single unit of information in a computer, typically represented as a 0 or 1.
Lossless Compression
a data compression algorithm that allows the original data to be perfectly reconstructed from the compressed data.
Protocol
A set of rules governing the exchange or transmission of data between devices.
Image
A type of data used for graphics or pictures.
Metadata
Data that describes other data. For example, a digital image may include metadata that describe the size of the image, number of colors, or resolution.
Sampling
measuring values of the analog signal at regular intervals called samples. The samples are measured to figure out the exact bits required to store each sample.
Pixel
Short for “picture element” it is the fundamental unit of a digital image, typically a tiny square or dot which contains a single point of color of a larger image.
Hexadecimal Number System
A number system consisting of 16 distinct symbols - 0-9 and A-F - which can occur in each place value.
Lossless
A compression scheme in which every bit of the original data can be recovered from the compressed file.
Lossy
A compression scheme in which “useless” or less-than-totally-necessary information is thrown out in order to reduce the size of the data. The eliminated data is unrecoverable.
Digital Divide
is the idea that not everyone has equal access to the internet. Demographics such as household income, level of education, race and ethnicity, age, geographic location, and community type can affect an individual’s access to the internet.
Code
to write code, or to write instructions for a computer
