File Types in QTP (File Extensions)

I have compiled a master list of different file extensions used in QTP. Please let me know if I have missed anything here.

QTP File Types:

QTP File	File Type
QTP Script File	.mts
Batch test File	.mtb
Environmental Variable Files	.txt, .ini, .xml
Input/Output Data (Datatable)	.xls
Recovery Scenario Files	.qrs
Library Files	.vbs, .qfl, .txt
Object repository (Shared)	.tsr
Object repository (Per Action/Local)	.mtr
Action File	.mst
Virtual Object Collection	.vot