Original sentence: Virtual memory also, effectively, allows the address space to be larger than - or rather, extend beyond - the amount of real (or physical) memory available; the computer can put rarely-accessed pages into secondary storage (caching) and use the real memory (RAM) for new or active tasks
Edited sentence: Virtual memory also, effectively, allows the address space to be larger than - or rather, extend beyond - the amount of real (or physical) memory available; the computer can put rarely-accessed pages into secondary storage (cache) and use the real memory (RAM) for new or active tasks