Obsolete Class Numbers
PZ Class Numbers
- PZ1-PZ4
- PZ8.7-PZ10 [Exception: PZ10.3 etc. still okay to use]
- PZ15-PZ16 [Exception: PZ16.3 is still okay to use]
- PZ17
- PZ49.43
- PZ49.5-PZ49.63
- PZ90.F3
- PZ90.H3
Z class numbers:
- Z1001-Z8999
- Exception: Z1-Z1000.9 are still good to use