Concept:DASD is a computer acronym used for a category of permanent storage devices.
Explanation:DASD stands for Direct Access Storage Device.
It is a type of secondary or permanent storage where data can be accessed directly from any location.
Each storage location has a unique address, so the system does not need to read through earlier data first.
Examples include hard disk drives, optical discs, and other magnetic storage media.
This is different from serial or sequential access storage, where data must be read in order.
Among the options given, the correct expansion is Direct Access Storage Device.
Answer:D. Direct Access Storage Device