rar - WinRAR Compressed Archive File by Eugene Roshal
zip - ZIP compression File by PKWARE
tar - Consolidated Unix File Archive File by The GNU Project
jar - Java Archive File by Netscape, Sun Microsystems, Oracle Corporation
pdf - Portable Document Format File by Adobe Systems
epub - Electronic Publication File by International Digital Publishing Forum (IDPF)
mobi - Mobipocket File by Amazon
mov - QuickTime Movie File by Apple
apk - Android Package File by Android
7z - 7z compressed archive File by 7-Zip and Igor Pavlov
gz - Gnu Zipped Archive File by The GNU Project
gzip - Gnu Zipped File by Jean-loup Gailly, Mark Adler
fb2 - FictionBook 2.0 File by Fiction Book
These file formats are the most popular among users around the world for storing and sharing information, regardless of the operating system of the device or gadget.
And these file types are the safest and represent the least threat for operating systems, in terms of introducing malicious code.