B3 INT B3 - IBM ROM BASIC - used while in interpreter
B370 INT B3 - ZIPKEY - GET VERSION
B371 INT B3 - ZIPKEY - CONVERT TWO-LETTER ABBREVIATION TO STATE CODE
B372 INT B3 - ZIPKEY - CONVERT STATE CODE TO TWO-LETTER ABBREVIATION
B373 INT B3 - ZIPKEY - CONVERT STATE CODE TO STATE NAME
B374 INT B3 - ZIPKEY - CONVERT ZIPCODE TO ASCII DIGITS
B375 INT B3 - ZIPKEY - LOOK UP STATE CODE FOR ZIPCODE
B376 INT B3 - ZIPKEY - LOOK UP CITY AND STATE FOR ZIPCODE
B377 INT B3 - ZIPKEY - PLAY BACK EXIT KEY FOR ENTRY WITH GIVEN ZIPCODE
B378 INT B3 - ZIPKEY - LOOK UP ZIPCODES FOR A GIVEN STATE AND CITY
B379 INT B3 - ZIPKEY - LOOK UP ZIPCODES FOR A GIVEN CITY
B37A INT B3 - ZIPKEY - FETCH AN ENTRY FROM A PREVIOUS LOOKUP
B37B INT B3 - ZIPKEY - GET VALUES NEEDED TO SAVE ZIPKEY CONTEXT
B37C INT B3 - ZIPKEY - RESTORE ZIPKEY CONTEXT
B37D INT B3 - ZIPKEY - REQUEST POP UP
B37E INT B3 - ZIPKEY - GET NAME OF PRIMARY CITY FOR A ZIPCODE REGION
B37F INT B3 - ZIPKEY - ENABLE/DISABLE HOTKEYS
B380 INT B3 - ZIPKEY v2.0+ - DETERMINE STATE FOR AREA CODE