OFA - FCI

Other Hip Dysplasia Registries—An Approximation 

OFAFCI (European)BVA (UK/Australia)SV (Germany)
Excellent A-1 0-4 (no > 3/hip) Normal
Good A-2 5-10 (no > 6/hip) Normal
Fair B-1 11-18 Normal
Borderline B-2 19-25 Fast Normal
Mild C 26-35 Noch Zugelassen
Moderate D 36-50 Mittlere
Severe E 51-106 Schwere

OFA Excellent  Recommended for breeding - No signs of Hip Dysplasia
OFA Good Suitable for breeding
OFA Fair Permissible to breed but not recommended
"a" a stamp (acceptable hips)
a-normal Certified normal hips
a-Fast Normal Certified near normal hips - Fair
a-Noch zugelassen Certified still permissible
HD ZW Breed value assessment number
0\0 Negative for HD on left hip\right hip
2\2 HD in both hips - anything else is in between 
a1 "a" excellent
a2 "a" good
Ta3 "a"fair
a6 "a" Foreign
TC Transitional Changes - Fair - Fast Normal - Borderline
A1 or A2 FCI - Excellent or Good repectively
B1 or B2 FCI - Fair - Near Normal - Transitional Changes
C1 or C2 FCI - Mild Hip Dysplasia
D1 or D2 FCI - Moderate Hip Dysplasia
E1 or E2 FCI - Severe Hip Dysplasia