- error test
- error tolerance
- error tolerance-and-correction mechanism
- error trapping
- error-trapping decoding
- error variance
- error vector
- error within a code
- error word
- ERS
- Ershan Yizu Zizhixian
- Ershisi Lu
- ershiwuwei songshi wan
- Ershov
- Ershov hierarchy
- Erskine Caldwell
- Ersu language
- Ersu Shaba script
- ERT
- Ertan Hydropower Station
- ERTICO
- ERTICO-ITS Europe
- Ertix He
- ERTMS
- ertor