RAM
As in Random Access Memory
(1)..Almost all (modern) memory and storage devices these days, are random access.
(2)..Similarly, ROM=Read Only Memory, because most ROMs are really flash these days, which are writable.
(3)..Also, RAM is (originally) intended to mean SRAM (as in Static Ram). But most RAM these days (especially for PCs), is actually Dynamic Ram (DRam), which is something quite different. E.g. It can need regular refreshing.
I guess it should really be called V### (### = something), where V = volatile.
But we are probably going to have RAMs, in the coming future (now/10/20/30 etc years), which don't lose their contents when power is switched off.
I think there are already Ram like, flash devices and similar. E.g. FRAM. So in time, they may become commonplace and replace RAM.
In the same way, flash has mostly replaced masked ROMs, these days.