Global summary
+ CPU util bar
o S = system time
o U = user time
o R = real time
o N = nice time
o A = anti-nice time
+ Disk util bar
o F = file system activity
o V = virtual memory activity
+ Mem util bar
o S = system usage
o U = user usage
o B = buffer cache usage
+ Swap util bar
o U = used swap space
o R = reserved swap space

Per-process information
> process name
> PID
> PPID
> PRI = 0-255, higher the number lower the priority
> user name
> CPU utilisation
> cumulative CPU = total CPU time consumed by a process over the cumulative collection time
> disk IO rate = average number of physical disk IOs per second made by the process
> resident memory usage (RSS) = text + data + stack + shared memory
> thread count (Thd Cnt) = total number of kernel threads for the current process