APK extension is used to deliver and install application software and middleware onto Google Android system. APK file contains compiled Android application code and all resources which are required by this code.

QFX file extension is a open financial exchange file generated by Quicken. It is used to store financial information. QFX files are based on XML format and usually contain financial transactions for certain accounts.

EMZ file extension is used to store Windows compressed graphics metadata. It contains a recorded sequence of Windows GDI (Graphics Device Interface) graphics functions and is the successor to the older File extension WMF (Windows Metafile) format.

CSV file extension is an abbreviation comma separated values. Files in CSV format are used to store textual data delimited by commas. CSV files can have one or multiple lines. First line of many CSV files typically contains header for the data in CSV file

File Extension SVT is created by Torchlight game. Torchlight is a role playing game. SVT files store information like pet data, items, gold and other character info.

File Extension MSG is used to store messages created by Microsoft Outlook. Information stored in MSG contains actual e-mails with all related information including recipients and sender

File Extension OFX is an open financial interchange file format. It is used by financial instititutions to exchange information about financial transactions.