Why are SO-DIMMs used in laptops and other compact computers?

SO-DIMMs, or Small Outline Dual In-line Memory Modules, are used in laptops and compact computers primarily because of their reduced physical footprint compared to standard DIMMs.

Standard DIMM modules are designed for desktop motherboards where space is relatively abundant. In contrast, the compact design of a SO-DIMM is roughly half the length of a standard module, allowing it to fit into the restricted internal chassis of portable devices. By utilizing this smaller form factor, manufacturers can provide high-capacity memory while maintaining the slim, lightweight profiles required for modern laptops and small-form-factor PCs.