National Board | |
USA | NB |
OF | |
abbr. chem. scient. | Oxygen Free |
abbr. IT | Output File; Overflow Flag |
abbr. mil. | Objective Force; Opposing Force; Optional Form |
abbr. progr. IT | Open File |
abbr. sport. | Outfield; Outfielder |
examination | |
abbr. inf. | exam |
| |||
NB |
National: 113 phrases in 24 subjects |