What does VITR stand for?

Video/Instrumentation Tape Recorder (SAUS)

Violaceous Trogon - Common English name - American Ornithologists Union four-character bird identification - Scientific name: Trogon Violaceus (IBP)

Vitreum - Glass - Latin (ADA)

Vitreous - Ophthalmology - Latin (DAVI)

Vitruvius - First century BC - Classical studies (OCD)