UniDIMM. Explanation: The following is an upgrade to the SODIMM standard:The new standard, called SO-DIMM+ (or SO-DIMM Plus), is an extension to the existing SODIMM standard that adds support for a wider range of memory modules, including those with higher capacities and faster speeds. The SO-DIMM+ standard is also backward-compatible with existing SODIMM modules, so it can be used in existing devices.