Out There Flapping (Airborne)
Organ Transplant Fund
Synonym for optical transfer function ... <microscopy> The relationship between the image produced by an optical instrument and the amplitude and phase of a periodic specimen, measured at various spatial frequencies. ... The optical transfer function curve, which shows how well contrast is maintained for finer specimen details, is a complex f...
Off The Floor -or- On The phone (Fone)
Open Token Foundation
Operations Task Force
On Top Fix