The main printer is in the commons area and has ip, 10.208.108.5 (or 128.208.108.5 from outside the lab). It is called shadlenHP from the linux machines, and is the default printer. There is also a printer in the lab, which has ip, 10.208.108.8 (or 128.208.108.8 from outside the lab). It is called shadlen from the linux machines. The copy machine next to Cheryl's desk has ip 172.25.153.2.
The printer in the lab also has a scanner. It is easiest to use scanner software on your computer to scan with it, rather than trying to send a scan from the scanner itself to your computer.
When adding the printer to a mac, the HP main printer may not show up in the network. Use the button for IP printer, Protocol Line Printer Daemon - LPD, Address 128.208.108.5, and print using HP Color LaserJet 5550 v3010.107 as driver.
If you are getting errors printing from Matlab on a Mac, open up System Preferences, Print & Fax, and click on Options and Supplies for the printer. Change the name from 128.208.108.5 to something without periods, like Shadlen Lab HP. Restart Matlab.