f2db8a79_OS_X_Tips_Tweaks_and_Tutorials__What_the_data_means
[Category] Totals [Subcategory] Handles [What the data means] 
Lets a program use system resources such as registry keys, fonts, and bitmaps. Sometimes, poorly written programs don’t close their handles down when the program closes, leading to memory loss. As a practical matter, you won’t need to monitor this number.
Windows Task Manager – Performance Monitoring Explained | Windows Vista,XP, Linux and OS X Tips,Tweaks and Tutorials
What the data means