4GL-Source-code
4H3-STABCAL-stability-calculation-for-aqueous-systems-File
4-IBM-Embedded-ViaVoice-voice-type-languages-scripts-data-file-format
4KHZ-Unknown-Apple-II-File
4LB-4th-Dimension-Database-Windows-Label-4D-Inc
4LK-4th-Dimension-Database-Windows-Hot-Link-File-4D-Inc
4MA-FileMaker-Runtime-Database-FileMaker-Inc
4MD-Music-file
4MP-4-MP3-Database-File
4O3-STABCAL-stability-calculation-for-aqueous-systems-File
4O5-STABCAL-stability-calculation-for-aqueous-systems-File
4PK-Perfect-Keyboard-Macro-Set-Pitrinec-Software
4PP-Photoparade-Slideshow-player
4PP-PhotoParade-Ver-4-Slideshow-Callisto-Corporation
4QR-4th-Dimension-Database-Windows-Quick-Report-4D-Inc
4-Salt-Lake-City-Game-Music-File
4-Screen-Log-File
4ST-4th-Dimension-Database-Windows-Saved-Set-4D-Inc
4SW-4DOS-Swap-File
4SW-4DOS-Swap-File-4DOS
4SW-Swap-file
4TH-Forth-language-source-file
4TH-Forth-source-code
4TH-FORTH-Source-Code-Program
4-Tuningwrench-Audio-Utility-compressed-file
_4-Tuningwrench-Audio-Utility-compressed-file
4T-Unknown-Apple-II-File
4UG-4th-Dimension-Database-Windows-User-Groups-Set-4D-Inc
4-Unformatted-manual-page-Roff-nroff-troff-groff
4V-Music-file
4V-Quartet-Music-File
4VR-4th-Dimension-database-windows-saved-variable
4VR-4th-Dimension-Database-Windows-Saved-Variable-4D-Inc
4WD-WebMerge-Data-List-File-Fourth-World-Media-Corporation
4W-Four-Winds-Mah-Jong-Saved-Layout-Game-Lagarto
4X4-4X4-off-road-game
4XM-4X-Movie-Format
4XM-4X-Movie-video-Header
4ZX-Genero-zoom-module-settings-file
500-FreeBSD-file
500-NCBridge-NC200-NC400-Series-Network-Boot-Software
500-Nintendo-Famicom-Disk-System-file
500-Tally-File-Tally-Solutions-Pvt-Ltd
500-Unknown-Apple-II-File
_501-Apple-MAC-OS-X-file
504-Unknown-Apple-II-File
509-Internet-security-certificate
512-Unknown-Apple-II-File
520-Unknown-Apple-II-File
521-Murray-State-University-Trojan-Ring-Configuration-File
TechTarget file types