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Extensão	Desenvolvedor de Tipo de Arquivo	Categoria do Arquivo	Descrição do Tipo de Arquivo	Software Primário	Desenvolvedor de Software Primário
.OCD	Ocad Inc.	Arquivos GIS	OCAD Map File	OCAD	Ocad Inc.
.OCP	Zylox Software, Inc.	Arquivos GIS	Offline Commander Project File	Offline Commander	Zylox Software, Inc.
.OKM	Gian Paolo Saliola	Arquivos GIS	OkMap Map Defining File	OkMap	Gian Paolo Saliola
.OMD	Pitney Bowes	Arquivos GIS	MapInfo Routing J Server Data	MapInfo Professional	Pitney Bowes
.OSB	Bart Vanhauwaert, Chris Browet, Ladislav Láska, and others	Arquivos GIS	OpenStreetMap Binary Map File	Merkaartor	Bart Vanhauwaert, Chris Browet, Ladislav Láska, and others
.OSC	OpenStreetMap	Arquivos GIS	OpenStreetMap Change File	Merkaartor	Bart Vanhauwaert, Chris Browet, Ladislav Láska, and others
.OSL	Ockam Instruments	Arquivos GIS	OckamSoft Log File	OckamSoft	Ockam Instruments
.OSM	OpenStreetMap	Arquivos GIS	OpenStreetMap Map File	Merkaartor	Bart Vanhauwaert, Chris Browet, Ladislav Láska, and others
.OV2	TomTom International BV	Arquivos GIS	TomTom POI (Points Of Interest) Database	TomTom HOME	TomTom NV
.OZF2	D & L Software Pty Ltd	Arquivos GIS	OziExplorer Map File	OziExplorer	D & L Software Pty Ltd
.OZFX3	D & L Software Pty Ltd	Arquivos GIS	OziExplorer Image	OziExplorer	D & L Software Pty Ltd

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