Office of Fair Trading 
Operational Flight Trainer 
Orbital Flight Test 
Office of Force Transformation 
Optical Fiber Tube 
Optical Fiber Thermometry 
OPTICAL FOURIER TRANSFORM 
Orbiter Flight Test 
Observed Fire Trainer 
Operational Flight Trainers 
Outer Fix Time 
Governor's Office for Technology 
often 
Ojai Federation of Teachers 
open field test 
Operational Feasibility Test 
Operational Flight Test 
Optical Fabrication and Testing 
Optical Fibre Thermometry 
Optimum Flight Trajectory 
oral fluid therapy 
Orbital Flight Tests 
osmotic fragility test 
outflow tract