Why is a computerized system better than a manual system?

Well, honey, let me break it down for you. A computerized system is faster, more accurate, and can handle a heck of a lot more data than some poor soul trying to do it all by hand. Plus, it's less prone to human error, so you won't have to deal with Bob in accounting accidentally deleting half the company's records again. Trust me, computers may not have charm, but they sure as heck get the job done.