There are two main categories of storage devices. Primary storage, such as RAM, is used by computer systems to temporarily store and retrieve data. Secondary storage devices, such as hard drives, offer a more permanent solution. Some electronic devices use flash memory cards as storage devices as well.
The definition of upmost is uppermost or nearest to the top. The cabinets nearest to the top are examples of the upmost cabinets. upmost. upmost.
Definition of layer. 1  1 : one that lays something (such as a worker who lays brick or a hen that lays eggs) 2  2a : one thickness, course, or fold laid or lying over or under anotherb : stratumc : horizon 2. 3  3a : a branch or shoot of a plant that roots while still attached to the parent plantb : a plant developed by layering.