Fifteen common symbols you can insert with the Alt key | Creative teaching and learning | Scoop.it
From www.makeuseof.com - November 11, 2015 8:15 AM

"There are many symbols that can't be typed on a standard keyboard, but what you might not know is that thousands of symbols can be typed with just the Alt key and the Number Pad. Next time you need to insert uncommon symbols (e.g. copyright, trademark, or square root), try this. Make sure Num Lock is turned on, hold …"