What does SDH stand for?

Scottish Diploma in Horticulture

Seasonal Derated Hours (IEEE)

Seasonal Derating Hours (SAUS)

Self Dumping Hopper (SAUS)

Serine Dehydrase - An enzyme (MAE)

Servicio de Helicopteros SL - Spain - ICAO designator (FAAC)

Single Dad's Hotline - Defunct (EA)

Sodexho Marriott Services - Pacific Exchange symbol

Sodexho Marriott Services - NYSE symbol

Sodexho Marriott Svcs. - NYSE symbol (SPSG)

Software Development Handbook - NASA (NASA)

Sorbitol Dehydrogenase - Also, Sorb D - An enzyme

South Dakota Historical Resource Center, Pierre, SD - OCLC symbol (OCLC)

Spatial Data Handling (GIS)

Spinal Dorsal Horn - Anatomy

Structured Document Handbook - Computer science

Styling Data Handling

Subdural Hematoma - Medicine

Subjacent Dorsal Horn (DB)

Succinate Dehydrogenase (SAUS)

Succinic Dehydrogenase - An enzyme

Support Dogs for the Handicapped (EA)

Synchronous Data Hierarchy (AEBE)

Synchronous Digital Hierarchy - Computer science

System Definition Handbook (SAUS)

System Development Handbook - NASA (NASA)