In addition to printing, an all-in-one printer by HP can also scan and copy. There are both inkjet and laser all-in-one printers. Every HP all-in-one printer nowadays has WiFi. A number of models can also print in color, print in duplex, fax, and have an automatic document feeder. This allows you to scan or copy a whole stack of documents in one go. Before purchasing an HP printer, determine which functions you need.