One product category that has grown rapidly in popularity recently is the Solid State Drive or SSD. By using an array of flash memory chips grouped together in a standard-sized enclosure, the SSD offers several benefits over a traditional hard disk drive. For one, they have no moving parts, so they operate completely free of noise. They also produce very little heat, which should make them ideal for use in tight spaces where cooling is a concern, like laptops and other portables. Their greater tolerance for vibration and shock are also a boon for notebook use, as is their lighter weight.