A SO-DIMM, or small outline dual in-line memory module, is a type of computer memory integrated circuit. SODIMM are a smaller alternative to a DIMM, being roughly half the size of regular DIMMs. As a result SO-DIMMs are mainly used in notebooks, small footprint PCs (such as those with a Mini-ITX motherboard), high-end upgradable office printers, and networking hardware like routers.