Professor Raúl Rojas has published a book about how symbols have been used throughout history in mathematics. The work was translated into English this year.

The asterisk (*) is the wildcard character that represents any sequence of characters, including when there are no characters at all. It’s the most flexible of the bunch, since it can replace any ...

D espite its age, Excel continues to evolve with new functions being added over time. There are newer better Excel functions that you should use instead of the old ones. But, there are also some old ...

By entering certain strings of numbers and symbols into your phone's dialer, you can gain access to a world of hidden information. Here's how to do it.