What does ALTE stand for?

Aleutian Tern - Common English name - Scientific name: Sterna Aleutica - American Ornithologists Union four-character bird identification (IBP)

Altec Industries - NCIC trailer make code

Altitude Error

Altitude Transmitting Equipment - FAA (MSA)

Apparent Life-Threatening Episode - Medicine

Apparent Life-Threatening Event - Medicine (EDAA)

Association of Language Testers in Europe - United Kingdom (EAIO)