From the Romans to Twitter, the hash sign – or octothorpe – has had a rich history, and now this innocuous little character has found a mighty resurgence as the hashtag. What happened along the way?

Rand Fishkin calls the "hash" or "pound symbol" a "powerful SEO tool" that many experts rarely use. Demonstrating ways to use it in his video series Whiteboard Friday, Fishkin says that "search ...

Social media has reached a certain level of popularity that is has also become so powerful nowadays. It is not just a special symbol for number or pound, but also a way to make a certain thing trend ...

From the Romans to Twitter, the hash sign – or octothorpe – has had a rich history, and now this innocuous little character has found a mighty resurgence as the hashtag. What happened along the way?

Twitter hashtags were created organically by Twitter users as a way to categorize messages. You use the hash symbol (#) to mark keywords or topics in your Tweet so that people searching for those ...

The hash symbol – also known as the pound/number sign, or even the octothorp(e) as Macworld reader Keith points out – was one of the more rarely used special characters until Twitter and Instagram ...

We haven't seen a typographical resurrection like it since the @, an obscure accounting symbol meaning "at the rate of", was pressed into service to form the first email address in 1971. According to ...

In some programming languages, the number sign (#), also called the "pound sign" and "hash sign," is used as a not-equals symbol. For example, the expression if amount # 500 means "if amount not equal ...

Excel spilled range operator (#) allows formulas to automatically adjust to changes in the spilled range size. You need to be using Excel for Microsoft 365 on Windows or Mac to make use of this handy ...