File Types

Animated Portable Network Graphics: an extension of the PNG format supporting animated images. It offers better quality and smaller file sizes than animated GIF with full alpha transparency.

macOS Application Bundle: a directory structure appearing as a single file in Finder, containing the executable, resources, frameworks, and metadata.

Archived by Robert Jung: a DOS-era archive format popular in the early 1990s, offering multi-volume archives and good compression for its time.

Sony Alpha Raw: Sony's proprietary RAW image format for Alpha series cameras, based on the TIFF specification.

Advanced Systems Format: a Microsoft container format for streaming audio and video. It is the base format for WMV and WMA files.

Active Server Pages: Microsoft server-side web technology. ASP (Classic) uses VBScript; ASPX (ASP.NET) uses C# or VB.NET with the .NET framework.

Advanced SubStation Alpha: a subtitle format supporting advanced styling, positioning, fonts, colors, and animation effects. Popular in anime fansubbing.

Sun/NeXT Audio: an audio file format from Sun Microsystems commonly used on Unix/Solaris systems. It supports various encodings including PCM and mu-law.

AOMedia Video 1: an open, royalty-free video codec developed by the Alliance for Open Media. It offers ~30% better compression than H.265/HEVC and is adopted by Netflix, YouTube, and all major browser...

Audio Video Interleave: a multimedia container format introduced by Microsoft in 1992. It interleaves audio and video data in a single file using the RIFF container.

AV1 Image File Format: a modern image format based on the AV1 video codec. It offers superior compression over JPEG and WebP with support for HDR, wide color gamut, and transparency.

A domain-specific language for text processing and data extraction. Standard on Unix/Linux systems for pattern scanning and processing of structured text files.

Amazon Kindle Format 8: the e-book format used by modern Kindle devices, supporting HTML5, CSS3, and advanced formatting features beyond MOBI.

Source code for Ada, a structured, statically typed language designed for safety-critical systems in aerospace, defense, and transportation.

An open interchange framework for baked geometric data (animations, simulations). Standard in VFX pipelines for passing cached data between applications.

YAML files defining automation tasks for Ansible, an IT automation tool for configuration management, application deployment, and orchestration.

A directory-level configuration file for Apache HTTP Server. It allows per-directory overrides of server configuration including URL rewriting, authentication, and access control.

An open table format for large analytic datasets, supporting schema evolution, hidden partitioning, and time travel on data lakes.

Apache Arrow IPC format (formerly Feather): a columnar in-memory data format for efficient analytics and zero-copy data exchange between Python, R, and Java.

A lightweight markup language for writing technical documentation. More powerful than Markdown with native support for tables, admonitions, and includes.