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Abstraction is a key pillar in computer science theory and particularly object orientated programming.

Presentation on Abstraction

 

Further reading and articles 

https://en.wikipedia.org/wiki/Abstraction_(computer_science)

https://www.w3schools.com/java/java_abstract.asp

https://www.bbc.co.uk/bitesize/guides/zttrcdm/revision/1

 

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