The Library computers are indeed open to everybody. There is no log-in; all one has to do is hit the “Enter” key if it asks for a password and it will automatically log itself in.
To print from the computers, a message will pop up asking for a User ID and Password. You can make up your own ID and password (most students type in their name for the ID and any set of numbers for the password). Then go to the printer you had selected, color on the left or black-and-white on the right, and slide your Gold Card at the reader. After that, look on the touch screen for the ID you entered. Tap your ID, then use the keypad to type in your numerical password. Once it opens up to your print job, just hit “Print.”