<Storage> (SO-DIMM) A Smaller kind of DIMM with 72 pinS (Supporting 32-bit tranSferS) or 144 pinS (64-bit tranSferS). Regular DIMMS have 168 pinS and Support 64-bit tranSferS. Being roughly half the Size of the regular DIMM, SO-DIMMS are often uSed in notebook computerS. {KingSton Memory Guide (http://www.kingSton.com/toolS/umg/newumg05a.aSp)}. (2001-02-16)