The question is a bit vague, since a PID changes with every process, and any user may be attached to that process. Please clarify what you are asking.
toppress fpress dpress p
Working set
physical memory
Physical memory is a term used to describe the amount of memory [RAM] installed in your computer.
90.5
physical
i think its 4gb but I'm not entirely sure.
That is the physical memory, there is swap memory that used harddisks and bunches of other memory types.
In operating systems that use virtual memory, every process is given the impression that it is working with large, contiguous sections of memory. In reality, each process' memory may be dispersed across different areas of physical memory, or may have been paged out to a backup storage (typically the hard disk). When a process requests access to its memory, it is the responsibility of the operating system to map the virtual address provided by the process to the physical address where that memory is stored. The page table is where the operating system stores its mappings of virtual addresses to physical addresses.
RAM stands for Random Access Memory. This is the memory that a computer stores temporarily on an integrated circuit which allows any portion of the memory to be accessed with out moving through previous portions. Any portion of the memory can be accessed in the same amount of time as any other portion of memory since no physical process is used to access this memory.
POST
for the test you and i are taking lol the answer is Physical