But what does SAP actually do? Well, my answer will be too long if i write each and every product of SAP and what each product actually does. For that you can go to the company website or look it up in Wikipedia. But the short answer is: they are making profits by selling their products and services.
Most states require a commercial driver to be at least 18 years old. However, you will not be able to leave your home state in a commercial truck (this is called intrastate driving). To drive outside of your home state (interstate driving) you must be at least 21 years old. Therefore, most trucking companies will not hire a driver who is under the age of 21.
Looks like Rick and Rhys already beat me to it, but their answers are pretty much spot on. Seeing as how something additional can always added to a Quora thread, thought that I'd toss this image that I found online into the mix to try and help a bit more. Take a gander at what I found: As can clearly be seen, semi trucks are pretty massive. Simply put, there's a reason that it's so important for motorists to Drive Defensively around them: they're huge. Anyway, hope that this helps! Thanks for an awesome question.