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1RAMrandom access memory a fast volatile memory used for quick access to programs and files.
2ROMread only memory such as a CD can be read but cannot be changed
3Flash Memorytype of memory that retains data in the absence of power.
4Memory as a wholepart of a computer which data or program instructions can be stored for retrieval
5ThrashingIn systems that use virtual memory, the result is the hard drive being used excessively for virtual memory because the physical memory (i.e., RAM) is full. (The process of moving data into and out of virtual memory also is called swapping pages.) Disk thrashing considerably slows down the performance of a system because data has to be transferred back and forth from the hard drive to the physical memory.
A sure sign that your computer is thrashing is when an application stops responding but the disk drive light keeps blinking on and off. Thrashing is generally caused by too many processes competing for scarce memory resources. To temporarily stop thrashing, you need to terminate one or more applications. To stop it permanently, you need to install more main memory.
Disk thrashing can result in permanent failure of the hard drive
6Virtual Memorymemory that appears to exist as main storage although most of it is supported by data held in secondary storage, transfer between the two being made automatically as required