Compression coding


Squishing a bit of data[1] down so that it takes up less space than the original. There are two kinds of compression:
*Lossy compression – you remove some of the data (sometimes there might be a pattern, so you remove the repeating bit and say that it repeats)
*Lossless compression – stores a map of the repeating bits[2], so that you do not remove any data in the compression

A Zip file is one type of file that can contain several other files that have been compressed together.

Terms definitions
1. data. Raw facts or figures without context or meaning. e.g. 1, “Boris”, False Related Articles: Progress Outcomes – Computational Thinking MatrixComputational Thinking« Back to Glossary Index
2. bits. Short for ‘binary digit’, it is the smallest unit of data that a computer can have. It can only be a one or a zero. Related Articles: Progress Outcomes – Computational Thinking MatrixComputational Thinking« Back to Glossary Index