Connection file created by Contribute, an Adobe program used for website development and publishing; saves the remote host, the connection protocol (e.g., FTP, SFTP, etc.) and the username; enables users to reuse connection information and distribute it among website developers.

When you double-click an STC file, Contribute opens a connection to the remote server and shows the remote files.

3D model exported from a Shade 3D model to a format recognized by Manga Studio; created by the "Shade to Manga Studio" plug-in, which is included with Manga Studio EX; can be imported into comic books designed with Manga Studio.

STC files generally include models of characters used in comics. Manga Studio became Clip Studio Paint in 2015. It is also known as ComicStudio in Japan.

Theme file used by Siemens mobile phones; stored within a .SDT global theme file and contains XML markup that specifies how the theme looks and what sounds to play; can be viewed with any text editor.

Template for creating a new spreadsheet file; originally used by the older StarOffice software and still supported by the more recent Apache OpenOffice; created by the Calc program included with StarOffice.

Apache OpenOffice now uses the .OTS OpenDocument format for storing spreadsheet templates. NOTE: Apache OpenOffice was formerly known as OpenOffice.org.