HP Deskjet 3420 Color Inkjet Printer - Manual (Page 16)

connectivity
The HP printer connects to the computer with a Universal Serial Bus (USB) cable,
which is purchased separately. Your computer must be running the Windows 98, Me,
2000, or XP operating system to use a USB cable.
For instructions on connecting your printer with a USB cable, see the Setup poster
that came with your printer.
16 16 16