Extension	File Type Developer	File Category	File Type Description	Primary Software	Primary Software Developer
.33B	Unknown Developer	Developer Files	SYNETSIM Source Code	SYNETSIM	Unknown Developer
.3RF	Global Publishing Solutions	Developer Files	Advent 3B2 Extensions Script Cross Reference	Advanced Print Publisher (formerly Advent 3B2)	Global Publishing Solutions
.4DB	4D, Inc	Developer Files	4th Dimension Database Structure File	Unknown Software	Unknown Developer
.4DC	4D, Inc	Developer Files	4th Dimension Database Structure File	Unknown Software	Unknown Developer
.4FI	4D, Inc	Developer Files	4th Dimension Insider File	4D SQL	4D, Inc
.4GE	IBM	Developer Files	IBM Informix 4GL Compiled Source Code	IBM Informix	IBM
.4GL	IBM	Developer Files	Informix 4GL Language Source Code	IBM Informix	IBM
.4PK	Pitrinec	Developer Files	Perfect Keyboard Macro Set	Perfect Keyboard	Pitrinec
.4TH	Open Source	Developer Files	Forth Language File	Kate	KDE

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