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.
For completeness, we need to know a few definitions 1  :-. Class Boundaries define the class interval - the upper class boundary (UCB) is the maximum possible value which would be in the class, and the lower class boundary (LCB) is the minimum value which would be in that class.