Ser
- Bogdand
- Cadena SER
- Darren Cullen (graffiti artist)
- Endoplasmic reticulum
- Freeman Municipal Airport
- Hedva Ser
- Nicolas Charles Seringe
- SER (magazine)
- SIP Express Router
- Sequence of events recorder
- Ser (unit)
- Serangoon MRT station
- Serine
- Serpens
- Serr
- Serrano language
- Serres
- Single-ended recuperative burner
- Sir (disambiguation)
- Social-Economic Council
- Society for Ecological Restoration
- Society for Epidemiologic Research
- Soft error rate
- South Eastern Railway (England)
- South Eastern Railway zone
- St Erth railway station