File Types

A Python dependency specification file for Pipenv, separating development and production dependencies with deterministic builds via Pipfile.lock.

A configuration language by Apple that is programmable, scalable, and safe. It generates JSON, YAML, and other output formats with type-safe validation.

The dependency specification file for CocoaPods, the dependency manager for iOS and macOS Swift/Objective-C projects.

A tool for transforming CSS with JavaScript plugins, enabling features like autoprefixing, future CSS syntax, and linting. Used by Tailwind CSS and many modern build pipelines.

Configuration file for PostCSS, a tool for transforming CSS with JavaScript plugins (autoprefixer, cssnano, Tailwind CSS).

A page description language developed by Adobe for professional printing and typesetting. PostScript is the predecessor to PDF and is still used in high-end print workflows.

A script file for PowerShell, Microsoft's task automation and configuration management framework. It combines command-line shell and scripting language.

Configuration file for Prettier, an opinionated code formatter supporting JavaScript, TypeScript, CSS, HTML, JSON, YAML, Markdown, and more.

Apple ProRes: a family of high-quality, lossy video compression codecs designed for professional video editing and post-production workflows.

A configuration file declaring the process types and commands for an application, used by Heroku and Foreman for process management.

YAML configuration for Prometheus, the open-source monitoring and alerting system. Defines scrape targets, alerting rules, and recording rules.

Java Properties File: a simple key-value configuration format used in Java applications for internationalization, logging configuration, and application settings.

The serialized binary output of Protocol Buffers. Used in gRPC communication, ML model storage (TensorFlow SavedModel), and high-performance data pipelines.

Google Protocol Buffers: a language-neutral mechanism for serializing structured data. Smaller, faster, and simpler than XML, used extensively in gRPC.

A high-performance template engine for Node.js (formerly known as Jade) that uses indentation-based syntax instead of closing tags, compiling to HTML. Popular in Express.js applications.

A strongly-typed functional language that compiles to JavaScript, inspired by Haskell. Used for building reliable web front-ends.

QEMU Copy On Write v2: the native disk image format for QEMU/KVM virtualization supporting snapshots, compression, and encryption.

Quite OK Image Format: a fast, lossless image format with a very simple specification (~300 lines of C). Designed for simplicity and speed over maximum compression.

A next-generation scientific publishing format by Posit (RStudio) supporting Python, R, Julia, and Observable JS for creating articles, presentations, and websites.

A document format combining R code, Markdown text, and output for reproducible statistical analysis reports and presentations.