An ASC file is commonly used as an armored ASCII file used by PGP (Pretty Good Privacy) and contains a digital signature and information written in plain text. It may also include binary information encoded as text and also include a key which can only be verified using PGP verification methods.

ASC files are plain text files stored in the ASC format. ASC is an acronym for American Standard Code for Information.

ASC files associated with Autodesk are text files that contain geometric shapes and points information that is exported by various programs of Autodesk. It saves data in a text format and is also compatible with other programs.

An ACS file could also be a communication file or a script written in the ActionScript programming language. This file type contains code that is executed by Flash Media Server hosting software and mainly used for loading Flash apps, streaming multimedia content, etc.

The ACS file extension is related to the LTspice circuit simulation application. It contains circuit schematic CAD drawing created by the program which may include the layout, symbols, and connections.

The ASC file extension is related to 3D Studio Max, an animation program developed by Autodesk. Autodesk developed the ASC file format in order to have an easier interchange of the 3D data between 3D modeling applications. It contains 3D scenes in ASCII format that is readable by any text editor but the scene itself can only be opened by programs that support the ASC file extension.

The ASC file is also used by Atari Jaguar, a video game console released in 1993. The file stores ASCII version of Jaguar Synth sound patch. This is MADMAC source code file that is usually included by one of the source code files used with the Jaguar Synth and Music driver.

The Atlantis Word Processor, an application used to create rich-formatted texts, uses the ASC file extension to store Spellchecker files.

The ASC file extension is associated with Apohysis, a Windows-only program used for designing and rendering fractal flames. It stores the majority of the sequence of program commands.