The Lexmark Optra T612n Laser Printer is a great printer for larger networks with multiple users. Printing true 1200 x 1200 dpi at up to 20 pages per minute, this laser printer can handle heavy usage, with a duty cycle maximum of 100,000 pages per month. It also comes with 16MB memory and is upgradeable to 272MB, giving it the ability to handle almost any project you can give it. It's compatible with all Windows operating systems, from 3.1 to 2000, and several UNIX systems, such as IBM AIX 4.x, HP-UX 10.x and 11.x, and Red Hat Linux 5.2 and 6.0 For a printer you can have confidence in, go for the Lexmark Optra T612n.