Some programming concepts

Library: Lets take for example. You write code that prints Hello World to the screen. Someone refines it and maybe it starts to ask input before printing. Someone again adds different text formatting to it and you no longer need to rewrite the same code ever again to achieve that functionality.

Framework: Imagine you are builing a house. and you get a system that provides the scafflolding, foundation and the frame at the same time so that you don't need to redo most of the work. This is like a library on a grander scale- flexibility/functionality is reduced.

SDK: In the old days - one would get a software development kit (something like pictured below). But it would be filled with floppy disks, documentation books etc. So it was an actual kit!

Class: This is a template\blueprint or a recipe list.

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Gentlest introduction : The Cloud

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