| PAID | Park Aid 
| Others |
| PAID | Parties in Advanced Industrial Democracies
| Others |
| PAID | Partnership Accounts for Individual Development
| Others |
| PAID | Partnership in Adaptation Implementation and Dissemination
| Others |
| PAID | Passion Authenticity Intensity and Direction
| Others |
| PAID | Payroll Audit Independent Determination
| Others |
| PAID | Pennsylvania Association for Individuals with Disabilities
| Others |
| PAID | People Against Impaired Driving
| Others |
| PAID | Personality And Individual Differences
| Others |
| PAID | Philadelphia Authority For Industrial Development
| Others |
| PAID | Pitiful And Incomprehensible Demoralization
| Others |
| PAID | Plutonium Air Inhalation Dose
| Others |
| PAID | Problem Areas in Diabetes
| Others |
| PAID | Procedures Applications Infrastructure And Data
| Others |
| PAID | Production Accounting and Invoicing Database
| Others |