Windows Title Bar

VE3JI
 

Hi All

I was wondering what the items in the left side of the Windows Title Bar are ?

My current one is :

JTAlert 2.16.4 VE3JI [~, 17M,DXK,F,#1] (!)

I understand what most of the items are but was wondering what the ... ~ ... F ... and the (!)  are 

thanks Ian VE3JI

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