| RD&D | Research Development and Demonstration 
| Others |
| RD&D | Research, development and Demonstration
| Others |
| RDD | R David Donoghue
| Others |
| RDD | Radar Detector Detector
| Others |
| RDD | Radioactive Destruction Device
| Others |
| RDD | Radioactive Dispersal Device
| Others |
| RDD | Radiological Dispersal Device
| Others |
| RDD | Radiological Dispersal Devices
| Others |
| RDD | Radiological Dispersion Device
| Others |
| RDD | Random Digit Dial
| Others |
| RDD | Random Digit Dialing
| Others |
| RDD | Random Discrete Dopants
| Others |
| RDD | Reactor Development and Demonstration
| Others |
| RDD | Readme Driven Development
| Others |
| RDD | Real Disk Drive
| Others |
| RDD | Rear Driveshaft Disconnect
| Others |
| RDD | Redding, California USA
| Others |
| RDD | Reference Document Database
| Others |
| RDD | Regional Delivery Director
| Others |
| RDD | Renault Driver Development
| Others |
| RDD | REPL Driven Development
| Others |
| RDD | Replaceable Database Driver
| Others |
| RDD | Replicable Database Driver
| Others |
| RDD | Requested Delivery Date
| Others |
| RDD | Required Delivery Date
| Others |
| RDD | Requirement Driven Design
| Others |
| RDD | Requirements and Design Document
| Others |
| RDD | Requirements Definition Document
| Others |
| RDD | Requirements Description Document
| Others |
| RDD | Requirements Documentation Directorate
| Others |
| RDD | Requirements Driven Development
| Others |
| RDD | Research and Development Division
| Others |
| RDD | Research and Development Document
| Others |
| RDD | Research and Development Documentation
| Others |
| RDD | Research Data Design
| Others |
| RDD | Research Design and Development
| Others |
| RDD | Research Design Develop
| Others |
| RDD | Residual Dark Distribution
| Others |
| RDD | Resilient Distributed Dataset
| Others |
| RDD | Resilient Distributed Datasets
| Others |
| RDD | Resilient Distribution Datasets
| Others |
| RDD | Respiratory Drug Delivery
| Others |
| RDD | Responsibility-Driven Design
| Others |
| RDD | Resume Driven Development
| Others |
| RDD | Retirement Disability and Death
| Others |
| RDD | Return Data Delay
| Others |
| RDD | Reverse Double-Dabble
| Others |
| RDD | Reviewable Design Data
| Others |
| RDD | Rights Data Dictionary
| Others |
| RDD | Rigid Disk Drive
| Others |
| RDD | Rodinny Detsky Domov (Family Style Orphanage)
| Others |
| RDD | Round Double Deflection
| Others |
| RDD | Rural Development Department
| Others |