| OLD | Occupational Lung Disease | 职业性肺病 |
| OLD | obstructive lung disease | 阻塞性肺病 |
| OLD | Off-Load Device | 卸载设备 |
| OLD | Old Lady Driver | 老太太司机 |
| OLD | Old Town, Maine USA | 美国缅因州老城 |
| OLD | Oxford Latin Dictionary | 牛津拉丁语词典 |
| OLD | Operational Logic Diagram | 操作逻辑图 |
| OLD | Optical Line Driver | 光线路驱动器 |
| OLD | One-Line Diagram | 单线图 |
| OLD | Office of Logic Design (NASA) | 逻辑设计办公室（NASA） |
| OLD | Orchid List Digest | 兰花列表摘要 |
| OLD | Operating Level Days | 运行水平天数 |
| OLD | on-line tests and diagnostics (US DoD) | 在线测试和诊断（美国国防部） |
| OLD | Online Dating | 在线约会 |
| OLD | Operations Limitation Document | 操作限制文件 |
| OLD | Old Version (file name extension) | 旧版本（文件扩展名） |
| OLD | Backup file | 备份文件 |