There are 2 file types use the .OTS file extension:
1. OpenDocument Spreadsheet Template
An OTS file is a spreadsheet template created by the Calc program included in Apache OpenOffice (formerly OpenOffice.org) or another spreadsheet application that supports the OpenDocument standard. It contains a spreadsheet saved in OASIS' OpenDocument XML-based formatting. OTS files allow users to create multiple .ODS spreadsheet files using the same styles and formatting.
Updated: December 31, 2016
2. OtsAV Album File
Audio file format used by OtsAV professional audio software; supports album cover art and long field lengths for artist and title information; can store albums as one logical file with multiple items, like a virtual CD.
Updated: May 17, 2008