Javascript Libraries
-High Charts
-D3

CDN: Refers to a javascript file somehwere else aka highcharts, all of the code is written on someone else's computer, Content Delivery Network

NPM, Bower, and Yarn are all using Node- framework, compiler,
JavaScript tags either go in the head, or last line of the body
JQuery: '$' symbol means that you will need to install JQuery with a CDN