Reader for swipe data from Vanderbilt cards scanned by: https://smile.amazon.com/Deftun-3-Track-Magnetic-Magstripe-Scanner/dp/B01DVWQ2BO/ref=sr_1_5?ie=UTF8&qid=1537316803&sr=8-5&keywords=card+swipe&dpID=41NjGex-0pL&preST=_SY300_QL70_&dpSrc=srch

swipe.js

const swipes = [];

require('readline')
  .createInterface({
    input: process.stdin,
    output: process.stdout,
    terminal: false,
  })
  .on('line', line => {
    console.log('\007'); // beep beep
    swipes.push(line.slice(1, line.search('=')));
  });

process.on('SIGINT', () => {
  swipes.forEach(swipe => console.log(`\n${swipe}`));
  process.exit();
});