Reference Example of a System Monitor displaying CPU and Memory Usage - NI Community
Memory Lane: Grokking memory problems in Activity Monitor – The Eclectic Light Company
CPU and Memory Performance Monitor
How to Check Your Computer's Memory Usage in Windows
Memory Monitor Download: A handy and intuitive application that enables users to monitor the RAM and the CPU real-time performance on their personal computer
Why does memory usage shown in System Monitor differ from that in ps_mem? - Ask Ubuntu