What does OSTF stand for?

Off-Site Test Facility (SAUS)

Olive-Striped Flycatcher - Common English name - American Ornithologists Union four-character bird identification - Scientific name: Mionectes Olivaceus (IBP)

Operational Silo Test Facility

Operational Suitability Test Facility - Aviation

Operational System Test Facility - Air Force

Optical, Sensor, Test, Facilities (ACAE)

Ordinance Survey Transfer Format - Great Britain's National Mapping Agency (GIS)

Ordnance Survey Transfer Format (SAUS)