| Acronym | Definition |
|---|
| PIG | Pretty Indian Girl |
| PIG | Put In Ground (pour out leftover molten metal) |
| PIG | Politically Incorrect Guide (Regnery Publishing) |
| PIG | Public Interest Group |
| PIG | Picture in Graphic |
| PIG | Pesticides in Groundwater |
| PIG | Pipeline Inspection Gauge |
| PIG | Pigfish (FAO fish species code) |
| PIG | Probability of Ignition (fires) |
| PIG | Private Interest Group |
| PIG | Product Information Guide |
| PIG | Property Insurance Group |
| PIG | Personal Interface to the Grid |
| PIG | Performance Indicator Group |
| PIG | Packet Internet Groper |
| PIG | Picture in Graphics |
| PIG | Pride Integrity Guts |
| PIG | Participation in Government |
| PIG | Projet d'Intérêt Général (French: General Interest Project) |
| PIG | Passive Income Generator (tax term related to passive activity rules) |
| PIG | Pressurized Inert Gas (filtering) |
| PIG | Pretty Interesting Guy |
| PIG | Professional Investment Group |
| PIG | Pretty Intelligent Girl |
| PIG | Pretty Intelligent Guy |
| PIG | Passive Information Gathering (software) |
| PIG | Partido da Imprensa Golpista |
| PIG | Proteome Informatics Group (Swiss Institute of Bioinformatics) |
| PIG | Plume-In-Grid |
| PIG | Politically Incorrect Gazette |
| PIG | Paint Inspection Gauge (Sheen Instruments) |
| PIG | Poor Indian Graduate |
| PIG | Pendulous Integrating Gyro |
| PIG | Program Implementation Group |
| PIG | Pursuing Instant Gratification |
| PIG | Pretty Interesting Girl |
| PIG | Product Implementation Guide |
| PIG | Patrol Investment Group |
| PIG | Partially Ionized Globule |
| PIG | Phillips Ionization Gauge |
| PIG | Pipeline Inspection Gadget |
| PIG | Product Integrity Group |
| PIG | Provide Information Goal |
| PIG | Photo Instrumentation Group |
| PIG | Plasma Ion Generator |
| PIG | Pretty Insensitive Girl |
| PIG | Plant Insect Group (lab discussion group) |
| PIG | Pretty Insensitive Guy |
| PIG | Parker Intubation Guide |
| PIG | Probability Impact Grid (risk analysis) |
| PIG | Plan-It-Green (educational program) |
| PIG | Parent Information Guide |
| PIG | Professionally Instructed Gunman |
| PIG | Permenantley Invited Guest |
| PIG | Perseverance, Integrity, and Guts |