MOST MOST Common File Extension Names —Made by AL Nahian Labib ● .mp3 - Audio File ● .wav - Recording File ● .pkg - Package file ● .rar - Compressed file like zip ● .zip - Compressed file ● .vcd - Virtual CD ● .apk - Android Application file ● .bin - Binary file ● .exe - PC application file ● .msi - windows installer package ● .ttf - True type font file ● .otf - Open type font file ● .ai - adobe illustrator file ● .bmp- Bitmap image ● .gif- Gif image (multi image) ● .ico - icon file ● .jpeg or .jpg - full image file ● .png - non background image file ● .psd - photoshop image file ● .svg - scalable vector graphics file ● .htm or .html - HTML file ● .ppt- powerpoint file ● .pps - powerpoint slide show ● .mkv - multimedia container (movie file) ● .m4v - video file for apple ● .mov - apple movie file ● .mp4 - video file ● .doc / .docx - microsoft word file ● .pdf - document file ● .txt - normal text file