You can scan a QR code using the camera on your smartphone, tablet, or computer — however, you may need to download an app.

Nmap is a free network scanning software available for Windows, Linux, macOS, etc. This open-source freeware can be used to check ping status, scan the entire network, check the uptime of any host, ...

So long as you have a built-in modem, you can use Windows Fax and Scan to send and receive faxes from your computer. Learn how to use this classic program along with alternative faxing methods.