Memory: Most printers come with enough memory to handle typical printing tasks. However, you can increase the installed memory in most machines if your office routinely prints complex, graphic-heavy documents.
Paper Capacity: The higher the paper capacity, the less often you have to reload paper, a great convenience in busy offices and a necessity for printers connected to multiple users.
Automatic Duplex Printing: Prints on both sides of the page automatically to save money and produce more professional looking documents.
Print Speed: Refers to how many pages your machine prints per minute (PPM). The higher the PPM, the faster you documents print.
Print Quality: 600 x 600 dpi is fine for everyday printing. For crisper finishes, look for resolutions of 1200 x 1200 dpi, or 2400 x 600 dpi for photo quality results.
Compatibility and Emulations: Do you use PCs, Macs or a combo both in your work place? Make sure you choose a compatible printer. In addition, some printers offer multiple emulations, such as PostScript and PCL 6, which may be required for certain applications.