Extension	File Type Developer	File Category	File Type Description	Software	Software Developer
.ENC	Smith Micro Software	Encoded Files	Encoded Data File	Yahoo! Instant Messenger	Yahoo!
.HST	Yahoo!	Data Files	History File	Yahoo! Instant Messenger	Yahoo!
.IMV	Pixela Corporation	Uncommon Files	ImageMixerVCD Project File	Yahoo! Instant Messenger	Yahoo!
.POST	Light of Creativity, Inc.	Data Files	LIGHT File	Yahoo! Instant Messenger	Yahoo!
.RTL	Hewlett-Packard	Raster Image Files	Raster Transfer Language File	Yahoo! Instant Messenger	Yahoo!

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