Extension	File Type Developer	File Category	File Type Description	Software	Software Developer
.O	Microsoft Corporation	Developer Files	Compiled Object File	Microsoft Visual Studio	Microsoft Corporation
.OCX	Microsoft Corporation	Developer Files	ActiveX Control	Microsoft Visual Studio	Microsoft Corporation
.ODL	Microsoft Corporation	Developer Files	Object Description Language File	Microsoft Visual Studio	Microsoft Corporation
.OLB	Microsoft Corporation	Uncommon Files	OLE Object Library	Microsoft Visual Studio	Microsoft Corporation
.OPT	LexisNexis	Database Files	Concordance Database File	Microsoft Visual Studio	Microsoft Corporation
.ORDEREDTEST	Microsoft Corporation	Developer Files	Visual Studio Ordered Test File	Microsoft Visual Studio	Microsoft Corporation

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