Daily Life — Questions & Answers

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• What Is .pdn
  .pdn is the native file format for Paint.NET, a free image editing software developed by Rick Brewster and first release...
• What Is .pem
  .pem (Privacy Enhanced Mail) is a base64-encoded text format used to store cryptographic keys and certificates, original...
• What Is .pez
  .PEZ is a file extension for Prezi Desktop Presentation files, a proprietary format introduced by Prezi for storing inte...
• What Is .pfx
  A .pfx file is a binary certificate container format that stores both the public and private key pair needed for SSL/TLS...
• What Is .pgm
  PGM (Portable GrayMap) is a simple, uncompressed image file format for storing grayscale images, developed by Jef Poskan...
• What Is .phtml
  The .phtml file extension, combining PHP and HTML, was popularized in the early 2000s by frameworks like Zend Framework ...
• What Is .pic
  .pic is a raster image file format used to store digital images as a grid of pixels, supporting various color depths fro...
• What Is .pipe
  A pipe is a mechanism that connects the output of one command or process to the input of another, enabling efficient dat...
• What Is .pkg
  A .pkg file is a macOS package installer that contains application files, libraries, and installation scripts. Introduce...
• What Is .pkpass
  .pkpass is a digital pass file format developed by Apple that stores information for Apple Wallet, which launched with i...
• What Is .pkt
  A .pkt file is a network simulation project file created by Cisco Packet Tracer, a cross-platform tool used for designin...
• What Is .plist
  .plist (property list) is a file format used primarily by Apple's macOS and iOS systems to store application configurati...
• What Is .pls
  .pls is a playlist file format used primarily for audio streaming, containing URLs and metadata for media players to acc...
• What Is .plx
  PLX is a multi-purpose file extension used primarily for Perl executable programs, Oracle Forms compiled libraries, and ...
• What Is .ply
  .PLY (Polygon File Format), also called Stanford Triangle Format, is a file format developed at Stanford University for ...
• What Is .pmd
  .pmd is a file extension primarily used for Adobe PageMaker page layout documents, a desktop publishing format discontin...
• What Is .pot
  .pot stands for Portable Object Template, a standardized text file format used for software internationalization and loc...
• What Is .potm
  .potm is a Microsoft PowerPoint template file format that supports macro-enabled content, introduced with Office 2007. T...
• What Is .potx
  .potx is Microsoft PowerPoint's template file format, introduced with Office 2007 and based on the Office Open XML (OOXM...
• What Is .pps
  .pps is a Microsoft PowerPoint file format introduced in 1995 that stands for "PowerPoint Show," and automatically launc...
• What Is .ppsm
  .ppsm is a Microsoft PowerPoint macro-enabled slideshow file format introduced with Office 2007, designed to deliver pre...
• What Is .ppsx
  .ppsx is a PowerPoint Show file format introduced by Microsoft in 2007 that automatically launches presentations in full...
• What Is .ppt
  .ppt is the file extension for Microsoft PowerPoint presentations, the standard format from 1987 to 2006 when it was rep...
• What Is .pptm
  .pptm is Microsoft PowerPoint's macro-enabled presentation format, introduced in 2007, that allows embedded VBA code for...
• What Is .prc
  .prc (Palm Resource Container) is a file format developed by Palm Inc. for Palm OS applications and e-books, primarily u...
• What Is .prd
  .prd is a file extension used by multiple applications, most commonly by SoftMaker Presentations for presentation files,...
• What Is .prof
  .prof is a file extension used to store profiling data generated by software profilers, which analyze program performanc...
• What Is .profile
  The .profile file is a hidden shell configuration file located in a user's home directory that executes automatically wh...
• What Is .project
  A .project file is an XML configuration file used by the Eclipse IDE to store metadata about a project, including its na...
• What Is .properties
  .properties files are plain-text configuration files that store key-value pairs, primarily used in Java applications sin...
• What Is .ps1
  .ps1 is the file extension for PowerShell scripts, Microsoft's command-line shell and scripting language released in Nov...
• What Is .psd1
  .psd1 is a PowerShell module manifest file that contains metadata about PowerShell modules, including version, author, d...
• What Is .psm1
  .psm1 is the file extension for a PowerShell Script Module, a container format introduced with PowerShell 2.0 in Novembe...
• What Is .ptx
  .ptx (Parallel Thread Execution) is NVIDIA's low-level intermediate assembly language used in GPU computing through the ...
• What Is .pub
  A .pub file is a public key file used in asymmetric cryptography and SSH authentication, containing the publicly shareab...
• What Is .pyc
  A .pyc file is a compiled Python bytecode file automatically created by the Python interpreter when a module is imported...
• What Is .pyd
  .pyd files are compiled Python extension modules used primarily on Windows systems to extend Python's functionality with...
• What Is .qcow
  QCOW (QEMU Copy-On-Write) is a disk image format developed for the QEMU emulator that stores virtual machine disk data w...
• What Is .qcow2
  QCOW2 (QEMU Copy-On-Write version 2) is a disk image format for the QEMU hypervisor, introduced in the mid-2000s as an e...
• What Is .qdf
  QDF (Quicken Data File) is a proprietary file format developed by Intuit used to store personal and business financial d...
• What Is .qpw
  A .qpw file is a spreadsheet document created by Corel Quattro Pro, a commercial spreadsheet application. The format was...
• What Is .r3d
  .r3d is a REDCODE RAW video file format created by RED Digital Cinema cameras, using wavelet compression to store ultra-...
• What Is .raf
  .raf is Fujifilm's proprietary raw image file format used by their digital cameras to capture uncompressed sensor data. ...
• What Is .rar file
  A .RAR file is a compressed archive format created by Eugene Roshal in 1993 that compresses data into a single container...
• What Is .rbx
  .rbx is a legacy file format used by Roblox to store game places and models in binary format before the platform standar...
• What Is .resx
  .resx (Resource Exchange) is an XML-based file format used in Microsoft's .NET framework, primarily introduced with .NET...
• What Is .ris
  .RIS is a plain text file format designed to store bibliographic and citation data, widely used by reference management ...
• What Is .rodata
  .rodata is a read-only data section in executable files that stores immutable constants, string literals, and static con...
• What Is .rsp
  .rsp files are plain text response files that contain command-line arguments and switches for Windows development tools....
• What Is .rsrc
  .rsrc is a section in Windows Portable Executable (PE) files that stores embedded resources such as icons, strings, bitm...