Lacking wifi connected printers it is easy to set up a Workgroup or Homegroup in Windows. A security key is created and given to the computers that need to join. You set sharing permissions of devices or folders or even programs. For instance, not only might Cmoputer A be able to select a printer destination connected to USB-1 on Computer B but also view-copy-edit any files in public folders that you allow permissions to.
This is teh LAN (Local Area Network) that another poster referred to