|#1 https://github.com/nchand/BarCodeGenerator/pull/2 <br>#2 https://github.com/Swap76/Learn-JavaScript/pull/322<br>#3 https://github.com/Swap76/Learn-JavaScript/pull/324 <br>#4|#1 https://ychoi63.blogspot.com/2019/10/osd600-lab04-first-pull-request.html <br>#2 https://ychoi63.blogspot.com/2019/10/the-second-pull-request.html<br>#3 https://ychoi63.blogspot.com/2019/10/the-third-pull-request.html<br>#4