f2db8a79_OS_X_Tips_Tweaks_and_Tutorials__What_the_data_means
[Category] Physical Memory (K) [Subcategory] Total [What the data means] 
Displays the total amount of RAM in your PC, in kilobytes. This number can be confusing; to find out the amount of RAM in megabytes, divide it by 1,024.
Windows Task Manager – Performance Monitoring Explained | Windows Vista,XP, Linux and OS X Tips,Tweaks and Tutorials
What the data means