<p>As almost everyone has said, it depends on the class.</p>
<p>In straight-lecture classes, perhaps like history or philosophy, a computer is a sensible option. Most people type much faster than they can write, so if writing everything the professor says is what you need to do, a computer’s the way to go. Relatedly, you might be aware that computers are the only way anyone takes notes in law school, and that this has been the case for far longer than computers were very common in undergrad classes. Remember Legally Blonde? <a href=“Legally Blonde - Great Clip - YouTube”>Legally Blonde - Great Clip - YouTube;
<p>In any class where you need to draw diagrams and graphs - economics, calculus, physics, chemistry, biology, etc. - it’s probably preferable to take notes by hand.</p>
<p>As a personal anecdote, when I was taking a class where the professor talked a bit fast, there were many mathematical symbols, but there were few graphs, I decided to go all out and LaTeX my notes. 
There’s nothing like math mode! </p>