Kingston Technology 256 MB, MicroDIMM 144-pin, DRAM Sony PictureBook, 0.25 GB, DRAM, 144-pin SO-DIMM Kingston Technology 256 MB, MicroDIMM 144-pin, DRAM Sony PictureBook. Internal memory: 0.25 GB, Internal memory type: DRAM, Memory form factor: 144-pin SO-DIMM