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| yr | YRA | YRB | YRC | YRG | YRI |
| YRITO | YRK | YRKG | YRL | YRLS | YRLY |
| YRM | YRMG | YRO | YRP | YRR | YRROA |
| YRT | YRV | YSB | YSC | YSCO | YSE |
| YSH | YSI | YSL | YSO | YSP | YSS |
| YSU | YSW | YT | YTC | YTD | YTE |
| YTG | YTI | YTL | YTM | YTR | YTS |
| YTT | YTY | YUEIF | YUJ | YULC | YUM |
| YUP | YURT | YVB | YVCA | YVL | YVS |
| YVT | YVU | YVV | YW | YWAS | YWAV |
| YWC | YWCU | YWHS | YWL | YWP | YWT |
| YXI | YXS | YYH | yymmdd | YYP | YYQ |
| YYYY | YZ | YZC | Z | z/OS | ZA |
| ZABC | ZAC | ZAG | ZAI | ZAM | ZAMS |
| ZANE | ZANY | ZAP | ZAPP | ZAPS | ZAQ |
| ZAR | ZARAF | ZAXS | ZAZ | ZB | ZBA |
| ZBAR | ZBC | ZBDC | ZBDF | ZBDP | ZBE |